The absolutist rhetoric employed heavily favors crowd reaction over veracity, with a large number of falsehoods which Trump presents as facts. Drawing on Harry G. Frankfurt's book On Bullshit, political science professor Matthew McManus points out that it is more precise to identify Trump as a bullshitter whose sole interest is to persuade, and not a liar (e.g. Richard Nixon) who takes the power of truth seriously and so deceitfully attempts to conceal it. Trump by contrast is indifferent to the truth or unaware of it. Unlike conventional lies of politicians exaggerating their accomplishments, Trump's lies are egregious, making lies about easily verifiable facts. At one rally Trump stated his father "came from Germany", even though Fred Trump was born in New York City.

Trump is surprised when his falsehoods are contradicted, as was the case when leaders at the 2018 United Nations General Assembly burst into laughter at his boast that he had accomplished more in his first two years than any other United States president. Visibly startled, Trump responded to the audience: "I didn't expect that reaction." Trump lies about the trivial, such as claiming that there was no rain on the day of his inauguration when in fact it did rain, as well as making grandiose "Big Lies", such as claiming that Obama founded ISIS, or promoting the birther movement, a conspiracy theory which claims that Obama was born in Kenya, not Hawaii. Connolly points to the similarities of such reality-bending gaslighting with fascist and post Soviet techniques of propaganda including Kompromat (scandalous material), stating that "Trumpian persuasion draws significantly upon the repetition of Big Lies."

Robert Jay Lifton, a scholar of psychohistory and authority on the nature of cults, emphasizes the importance of understanding Trumpism "as an assault on reality". A leader has more power if he is in any part successful at making truth irrelevant to his followers. Trump biographer Timothy L. O'Brien agrees, stating: "It is a core operating principle of Trumpism. If you constantly attack objective reality, you are left as the only trustworthy source of information, which is one of his goals for his relationship with his supporters—that they should believe no one else but him." Lifton believes Trump is a purveyor of a solipsistic reality which is hostile to facts and is made collective by amplifying frustrations and fears held by his community of zealous believers.

Journalist Elaina Plott suggests ideology is not as important as other characteristics of Trumpism. Plott cites political analyst Jeff Roe, who observed Trump "understood" and acted on the trend among Republican voters to be "less ideological" but "more polarized". Republicans are now more willing to accept policies like government mandated health care coverage for pre-existing conditions or trade tariffs, formerly disdained by conservatives as burdensome government regulations. At the same time, strong avowals of support for Trump and aggressive partisanship have become part of Republican election campaigning—in at least some parts of America—reaching down even to non-partisan campaigns for local government which formerly were collegial and issue-driven. Research by political scientist Marc Hetherington and others has found Trump supporters tend to share a "worldview" transcending political ideology, agreeing with statements like "the best strategy is to play hardball, even if it means being unfair." In contrast, those who agree with statements like "cooperation is the key to success" tend to prefer Trump's adversary former Republican presidential candidate Mitt Romney.

On January 31, 2021, a detailed overview of the attempt by combative Trump supporters to subvert the election of the United States was published in The New York Times. Journalist Nicholas Lemann writes of the disconnect between some of Trump's campaign rhetoric and promises, and what he accomplished once in office—and the fact that the difference seemed to bother very few supporters. The campaign themes being anti-free-trade nationalism, defense of Social Security, attacks on big business, "building that big, beautiful wall and making Mexico pay for it", repealing Obama's Affordable Care Act, a trillion dollar infrastructure-building program. The accomplishments being "conventional" Republican policies and legislation—substantial tax cuts, rollbacks of federal regulations, and increases in military spending. Many have noted that instead of the Republican National Convention issuing the customary "platform" of policies and promises for the 2020 campaign, it offered a "one-page resolution" stating that the party was not "going to have a new platform, but instead ... 'has and will continue to enthusiastically support the president's America-first agenda.'"

An alternate nonideological circular definition of Trumpism widely held among Trump activists was reported by Saagar Enjeti, chief Washington correspondent for The Hill, who stated: "I was frequently told by people wholly within the MAGA camp that trumpism meant anything Trump does, ergo nothing that he did is a departure from trumpism."

Trumpism differs from classical Abraham Lincoln Republicanism in many ways regarding free trade, immigration, equality, checks and balances in federal government, and the separation of church and state. Peter J. Katzenstein of the WZB Berlin Social Science Center believes that Trumpism rests on three pillars, namely nationalism, religion and race. According to Jeff Goodwin, Trumpism is characterized by five key elements: social conservatism, neoliberal capitalism, economic nationalism, nativism, and white nationalism.

At the 2021 CPAC conference, Trump gave his own definition of what defines Trumpism: "What it means is great deals, ... . Like the USMCA replacement of the horrible NAFTA. ... It means low taxes and eliminated job killing regulations, ... . It means strong borders, but people coming into our country based on a system of merit. ... [I]t means no riots in the streets. It means law enforcement. It means very strong protection for the second amendment and the right to keep and bear arms. ... [I]t means a strong military and taking care of our vets ... ."

Social psychology research into the Trump movement, such as that of Bob Altemeyer, Thomas F. Pettigrew, and Karen Stenner, views the Trump movement as primarily being driven by the psychological predispositions of its followers, although political and historical factors (reviewed elsewhere in this article) are also involved. An article in Social Psychological and Personality Science described a study concluding that Trump followers prefer hierarchical and ethnocentric social orders that favor their in-group.

In the non-academic book, Authoritarian Nightmare: Trump and His Followers, Altemeyer and John Dean describe research which reaches the same conclusions. Despite disparate and inconsistent beliefs and ideologies, a coalition of such followers can become cohesive and broad in part because each individual "compartmentalizes" their thoughts and they are free to define their sense of the threatened tribal in-group in their own terms, whether it is predominantly related to their cultural or religious views (e.g. the mystery of evangelical support for Trump), nationalism (e.g. the Make America Great Again slogan), or their race (maintaining a white majority).

Altemeyer, MacWilliams, Feldman, Choma, Hancock, Van Assche and Pettigrew claim that instead of directly attempting to measure such ideological, racial or policy views, supporters of such movements can be reliably predicted by using two social psychology scales (singly or in combination), namely right-wing authoritarian (RWA) measures which were developed in the 1980s by Altemeyer and other authoritarian personality researchers, and the social dominance orientation (SDO) scale developed in the 1990s by social dominance theorists.

In May 2019, Monmouth University Polling Institute conducted a study in collaboration with Altemeyer in order to empirically test the hypothesis using the SDO and RWA measures. The finding was that social dominance orientation and affinity for authoritarian leadership are highly correlated with followers of Trumpism. This study further confirmed of the studies discussed in MacWilliams (2016), Feldman (2020), Choma and Hancock (2017), and Van Assche & Pettigrew (2016).

The research does not imply that the followers always behave in an authoritarian manner but that expression is contingent, which means there is reduced influence if it is not triggered by fear and what the subject perceives as threats. Similar social psychological techniques for analyzing Trumpism have been effective in identifying adherents of similar movements in Europe, including in Belgium and France (Lubbers & Scheepers, 2002; Swyngedouw & Giles, 2007; Van Hiel & Mervielde, 2002; Van Hiel, 2012), the Netherlands (Cornelis & Van Hiel, 2014) and Italy (Leone, Desimoni & Chirumbolo, 2014). Quoting comments from participants in focus groups made up of people who had voted for Democrat Obama in 2012 but flipped to Trump in 2016, pollster Diane Feldman noted the anti-government, anti-coastal-elite anger: "'They think they're better than us, they're P.C., they're virtue-signallers.' '[Trump] doesn't come across as one of those people who think they're better than us and are screwing us.' 'They lecture us.' 'They don't even go to church.' 'They're in charge, and they're ripping us off.'"

Former speaker of the House Newt Gingrich explained the central role of dominance in his speech "Principles of Trumpism", comparing the needed leadership style to that of a violent bear. Psychology researcher Dan P. McAdams thinks a better comparison is to the dominance behavior of alpha male chimpanzees such as Yeroen, the subject of an extensive study of chimp social behavior conducted by renowned primatologist Frans de Waal. Christopher Boehm, a professor of biology and anthropology agrees, writing, "his model of political posturing has echoes of what I saw in the wild in six years in Tanzania studying the Gombe chimpanzees," and "seems like a classic alpha display."

Using the example of Yeroen, McAdams describes the similarities: "On Twitter, Trump's incendiary tweets are like Yeroen's charging displays. In chimp colonies, the alpha male occasionally goes berserk and starts screaming, hooting, and gesticulating wildly as he charges toward other males nearby. Pandemonium ensues as rival males cower in fear ... Once the chaos ends, there is a period of peace and order, wherein rival males pay homage to the alpha, visiting him, grooming him, and expressing various forms of submission. In Trump's case, his tweets are designed to intimidate his foes and rally his submissive base ... These verbal outbursts reinforce the president's dominance by reminding everybody of his wrath and his force."

Primatologist Dame Jane Goodall explains that like the dominance performances of Trump, "In order to impress rivals, males seeking to rise in the dominance hierarchy perform spectacular displays: Stamping, slapping the ground, dragging branches, throwing rocks. The more vigorous and imaginative the display, the faster the individual is likely to rise in the hierarchy, and the longer he is likely to maintain that position." The comparison has been echoed by political observers sympathetic to Trump. Nigel Farage, an enthusiastic backer of Trump, stated that in the 2016 United States presidential debates where Trump loomed up on Clinton, he "looked like a big silverback gorilla", and added that "he is that big alpha male. The leader of the pack!"

McAdams points out the audience gets to vicariously share in the sense of dominance due to the parasocial bonding that his performance produces for his fans, as shown by Shira Gabriel's research studying the phenomenon in Trump's role in The Apprentice. McAdams writes that the "television audience vicariously experienced the world according to Donald Trump", a world where Trump says "Man is the most vicious of all animals, and life is a series of battles ending in victory or defeat."

Cultural anthropologist Paul Stoller thinks Trump masterfully employed the fundamentals of celebrity culture-glitz, illusion and fantasy to construct a shared alternate reality where lies become truth and reality's resistance to one's own dreams are overcome by the right attitude and bold self-confidence. Trump's father indoctrinated his children from an early age into the sort of positive thinking approach to reality advocated by the family's pastor Norman Vincent Peale. Trump boasted that Peale considered him the greatest student of his philosophy that regards facts as not important, because positive attitudes will instead cause what you "image" to materialize. Trump biographer Gwenda Blair thinks Trump took Peale's self-help philosophy and "weaponized it".

Social psychologists describe as collective narcissism as a commonly held and strong emotional investment in the idea that one's group has a special status in society. It is often accompanied by chronic expressions of intolerance towards out-groups, intergroup aggression and frequent expressions of group victimhood whenever the in-group feels threatened by perceived criticisms or lack of proper respect for the in-group. Identity of group members is closely tied to the collective identity expressed by its leader, motivating multiple studies to examine its relationship to authoritarian movements. Collective narcissism measures have been shown to be a powerful predictor of membership in such movements including Trump's.

External videos
Presentation by John Fea on Believe Me: The Evangelical Road to Donald Trump, July 7, 2018, C-SPAN
Washington Journal interview with Fea on Believe Me, July 8, 2018, C-SPAN

In his book Believe Me which details Trump's exploitation of white evangelical politics of fear, Messiah College history professor John Fea points out the narcissistic nature of the fanciful appeals to nostalgia, noting that "In the end, the practice of nostalgia is inherently selfish because it focuses entirely on our own experience of the past and not on the experience of others. For example, people nostalgic for the world of Leave It to Beaver may fail to recognize that other people, perhaps even some of the people living in the Cleaver's suburban "paradise" of the 1950s, were not experiencing the world in a way that they would describe as 'great.' Nostalgia can give us tunnel vision. Its selective use of the past fails to recognize the complexity and breadth of the human experience ... ."

According to Fea, the hopelessness of achieving such fanciful versions of an idealized past "causes us to imagine a future filled with horror" making anything unfamiliar the fodder for conspiratorial narratives that easily mobilize white evangelicals who cannot summon "the kind of spiritual courage necessary to overcome fear." As a result, they not only embrace these fears but are easily captivated by a strongman such as Trump who repeats and amplifies their fears while posing as the deliverer from them. In his review of Fea's analysis of the impact of conspiracy theories on white evangelical Trump supporters, scholar of religious politics David Gutterman writes: "The greater the threat, the more powerful the deliverance." Gutterman's view is that "Donald J. Trump did not invent this formula; evangelicals have, in their lack of spiritual courage, demanded and gloried in this message for generations. Despite the literal biblical reassurance to 'fear not,' white evangelicals are primed for fear, their identity is stoked by fear, and the sources of fear are around every unfamiliar turn.

Social theory scholar John Cash notes that disaster narratives of impending horrors have a broader audience than a single community whose identity is associated with specific collectively held certainties offered by white evangelical leaders, pointing to a 2010 Pew study which found that 41 percent of those in the US think that the world will either definitely or probably be destroyed by the middle of the century. Cash points out that certainties may be found in other narratives which also have the unifying effect of binding like minded individuals into shared "us versus them" narratives such as those based on race or political absolutisms.

Cash notes that all political systems must endure some such exposure to the lure of narcissism, fantasy, illogicality and distortion. Cash thinks that psychoanalytic theorist Joel Whitebook is correct that "Trumpism as a social experience can be understood as a psychotic like phenomenon, that "[Trumpism is] an intentional [...] attack on our relation to reality." Whitebook thinks Trump's playbook is like that of Putin's strategist Vladislav Surkov who employs "ceaseless shapeshifting, appealing to nationalist skinheads one moment and human rights groups the next."

Cash makes comparisons to an Alice in Wonderland world when describing Trump's adept ability to hold a looking glass up to followers with disparate fantasies by seemingly embracing all of them in a series of contradictory tweets and pronouncements. Cash cites examples such as Trump appearing to support and encourage the "very fine people" among the "neo-Nazi protestors [who] carried torches that were clear signifiers of a nostalgia" after Charlottesville or for audiences with felt grievances about America's first black president, conspiracy fantasies such as the claim that Obama wiretapped him. Cash writes: "Unlike the resilient Alice, who, having stepped through the looking-glass, insists on truth and accuracy when confronted by a world of reversals, contradictions, nonsense and irrationality, Trump reverses this process. Captivated by his own image and, hence, both unwilling and unable to step through the looking-glass for fear of disturbing and dissolving that narcissistic fascination with his preferred self-image, Trump has dragged the uninhibited and distorted world of the other side of the looking-glass into our shared world."

Although the leader possesses dominant ownership of the reality shared by the group, Lifton sees important differences between Trumpism and typical cults, such as not advancing a totalist ideology and that isolation from the outside world is not used to preserve group cohesion. Lifton does identify multiple similarities with the kinds of cults disparaging the fake world that outsiders are deluded by in preference for their true reality—a world that transcends the illusions and false information created by the cult's titanic enemies. Persuasion techniques similar to those of cults are used such as indoctrination employing constant echoing of catch phrases (via rally response, retweet, or Facebook share), or in participatory response to the guru's like utterances either in person or in online settings. Examples include the use of call and response ("Clinton" triggers "lock her up"; "immigrants" triggers "build that wall"; "who will pay for it?" triggers "Mexico"), thereby deepening the sense of participation with the transcendent unity between the leader and the community. Participants and observers at rallies have remarked on the special kind of liberating feeling that is often experienced which Lifton calls a "high state" that "can even be called experiences of transcendence".

Conservative culture commentator David Brooks observes that under Trump, this post-truth mindset heavily reliant on conspiracy themes came to dominate Republican identity, providing its believers a sense of superiority since such insiders possess important information most people do not have. This results in an empowering sense of agency with the liberation, entitlement and group duty to reject "experts" and the influence of hidden cabals seeking to dominate them. Social media amplify the power of members to promote and expand their connections with like minded believers in insular alternate reality echo chambers. Social psychology and cognitive science research shows that individuals seek information and communities that confirm their views and that even those with critical thinking skills sufficient to identify false claims with non political material cannot do so when interpreting factual material that does not conform to political beliefs.

While such media-enabled departures from shared, fact-based reality dates at least as far back as 1439 with the appearance of the Gutenberg press, what is new about social media is the personal bond created through direct and instantaneous communications from the leader, and the constant opportunity to repeat the messages and participate in the group identity signaling behavior. Prior to 2015, Trump already had firmly established this kind of parasocial bond with a substantial base of followers due to his repeated television and media appearances. For those sharing political views similar to his, Trump's use of Twitter to share his conspiratorial views caused those emotional bonds to intensify, causing his supporters to feel a deepened empathetic bond as with a friend—sharing his anger, sharing his moral outrage, taking pride in his successes, sharing in his denial of failures and his oftentimes conspiratorial views.

Given their effectiveness as an emotional tool, Brooks thinks such sharing of conspiracy theories has become the most powerful community bonding mechanism of the 21st century. Conspiracy theories usually have a strong political component and books such as Hofstadter's The Paranoid Style in American Politics describe the political efficacy of these alternate takes on reality. Some attribute Trump's political success to making such narratives a regular staple of Trumpist rhetoric, such as the purported rigging of the 2016 election to defeat Trump, that climate change is a hoax perpetrated by the Chinese, that Obama was not born in the United States, multiple conspiracy theories about the Clintons, that vaccines cause autism and so on. One of the most popular though disproven and discredited conspiracy theories is QAnon, which asserts that top Democrats run an elite child sex-trafficking ring and President Trump is making efforts to dismantle it. An October 2020 Yahoo-YouGov poll showed that these QAnon claims are mainstream, not fringe beliefs among Trump supporters, with both elements of the theory said to be true by fully half of Trump supporters polled.

Some social psychologists see the predisposition of Trumpists towards interpreting social interactions in terms of dominance frameworks as extending to their relationship towards facts. A study by Felix Sussenbach and Adam B. Moore found that the dominance motive strongly correlated with hostility towards disconfirming facts and affinity for conspiracies among 2016 Trump voters but not among Clinton voters. Many critics note Trump's skill in exploiting narrative, emotion, and a whole host of rhetorical ploys to draw supporters into the group's common adventure as characters in a story much bigger than themselves.

It is a story that involves not just a community-building call to arms to defeat titanic threats, or of the leader's heroic deeds restoring American greatness, but of a restoration of each supporter's individual sense of liberty and power to control their lives. Trump channels and amplifies these aspirations, explaining in one of his books that his bending of the truth is effective because it plays to people's greatest fantasies. By contrast, Clinton was dismissive of such emotion-filled storytelling and ignored the emotional dynamics of the Trumpist narrative.

Peter E. Gordon, Alex Ross, sociologist David L. Andrews and Harvard political theorist David Lebow look on Theodor Adorno and Max Horkheimer's concept of the "culture industry" as useful for comprehending Trumpism. As Ross explains the concept, the culture industry replicates "fascist methods of mass hypnosis ... blurring the line between reality and fiction", explaining, "Trump is as much a pop-culture phenomenon as he is a political one." Gordon observes that these purveyors of popular culture are not just leveraging outrage, but are turning politics into a more commercially lucrative product, a "polarized, standardized reflection of opinion into forms of humor and theatricalized outrage within narrow niche markets ... within which one swoons to one's preferred slogan and already knows what one knows. Name just about any political position and what sociologists call 'pillarization'—or what the Frankfurt School called 'ticket' thinking—will predict, almost without fail, a full suite of opinions."

Trumpism is from Lebow's perspective, more of a result of this process than a cause. In the intervening years since Adorno's work, Lebow believes the culture industry has evolved into a politicizing culture market "based increasingly on the internet, constituting a self-referential hyperreality shorn from any reality of referants ... sensationalism and insulation intensify intolerance of dissonance and magnify hostility against alternative hyperrealities. In a self-reinforcing logic of escalation, intolerance and hostility further encourage sensationalism and the retreat into insularity." From Gordon's view, "Trumpism itself, one could argue, is just another name for the culture industry, where the performance of undoing repression serves as a means for carrying on precisely as before."

From this viewpoint, the susceptibility to psychological manipulation of individuals with social dominance inclinations is not at the center of Trumpism, but is instead the "culture industry" which exploits these and other susceptibilities by using mechanisms that condition people to think in standardized ways. The burgeoning culture industry respects no political boundaries as it develops these markets with Gordon emphasizing "This is true on the left as well as the right, and it is especially noteworthy once we countenance what passes for political discourse today. Instead of a public sphere, we have what Jürgen Habermas long ago called the refeudalization of society."

What Kreiss calls an "identity-based account of media" is important for understanding Trump's success because "citizens understand politics and accept information through the lens of partisan identity. ... The failure to come to grips with a socially embedded public and an identity group–based democracy has placed significant limits on our ability to imagine a way forward for journalism and media in the Trump era. As Fox News and Breitbart have discovered, there is power in the claim of representing and working for particular publics, quite apart from any abstract claims to present the truth."

Examining trumpism as an entertainment product, some media research focuses on the heavy reliance on outrage discourse which in terms of media coverage privileged Trump's rhetoric over that of other candidates due to the symbiotic relationship between his focus on the entertainment value of such storytelling and the commercial interests of media companies. A unique form of incivility, the use of outrage narratives on political blogs, talk radio and cable news opinion shows had in the decades prior become representative of a relatively new political opinion media genre which had experienced significant growth due to its profitability.

Media critic David Denby writes, "Like a good standup comic, Trump invites the audience to join him in the adventure of delivering his act—in this case, the barbarously entertaining adventure of running a Presidential campaign that insults everybody." Denby's claim is that Trump is simply good at delivering the kind of political entertainment product consumers demand. He observes that "The movement's standard of allowable behavior has been formed by popular culture—by standup comedy and, recently, by reality TV and by the snarking, trolling habits of the Internet. You can't effectively say that Donald Trump is vulgar, sensational, and buffoonish when it's exactly vulgar sensationalism and buffoonery that his audience is buying. Donald Trump has been produced by America."

Although Trump's outrage discourse was characterized by fictional assertions, mean spirited attacks against various groups and dog whistle appeals to racial and religious intolerance, media executives could not ignore its profitability. CBS's CEO Les Moonves remarked that "It may not be good for America, but it's damn good for CBS," demonstrating how Trumpism's form of messaging and the commercial goals of media companies are not only compatible but mutually lucrative. Peter Wehner, senior fellow at the Ethics and Public Policy Center considers Trump a political "shock jock" who "thrives on creating disorder, in violating rules, in provoking outrage."

The political profitability of incivility was demonstrated by the extraordinary amount of free airtime gifted to Trump's 2016 primary campaign—estimated at two billion dollars, which according to media tracking companies grew to almost five billion by the end of the national campaign. The advantage of incivility was as true in social media, where "a BuzzFeed analysis found that the top 20 fake election news stories emanating from hoax sites and hyperpartisan blogs generated more engagement on Facebook (as measured by shares, reactions, and comments) than the top 20 election stories produced by 19 major news outlets combined, including the New York Times, Washington Post, Huffington Post, and NBC News."

Surveying research of how Trumpist communication is well suited to social media, Brian Ott writes that, "commentators who have studied Trump's public discourse have observed speech patterns that correspond closely to what I identified as Twitter's three defining features [Simplicity, impulsivity, and incivility]." Media critic Neal Gabler has a similar viewpoint writing that "What FDR was to radio and JFK to television, Trump is to Twitter." Outrage discourse expert Patrick O'Callaghan argues that social media is most effective when it utilizes the particular type of communication which Trump relies on. O'Callaghan notes that sociologist Sarah Sobieraj and political scientist Jeffrey M. Berry almost perfectly described in 2011 the social media communication style used by Trump long before his presidential campaign.

They explained that such discourse "[involves] efforts to provoke visceral responses (e.g., anger, righteousness, fear, moral indignation) from the audience through the use of overgeneralizations, sensationalism, misleading or patently inaccurate information, ad hominem attacks, and partial truths about opponents, who may be individuals, organizations, or entire communities of interest (e.g., progressives or conservatives) or circumstance (e.g., immigrants). Outrage sidesteps the messy nuances of complex political issues in favor of melodrama, misrepresentative exaggeration, mockery, and improbable forecasts of impending doom. Outrage talk is not so much discussion as it is verbal competition, political theater with a scorecard."

Due to Facebook's and Twitter's narrowcasting environment in which outrage discourse thrives, Trump's employment of such messaging at almost every opportunity was from O'Callaghan's account extremely effective because tweets and posts were repeated in viral fashion among like minded supporters, thereby rapidly building a substantial information echo chamber, a phenomenon Cass Sunstein identifies as group polarization, and other researchers refer to as a kind of self re-enforcing homophily. Within these information cocoons, it matters little to social media companies whether much of the information spread in such pillarized information silos is false, because as digital culture critic Olivia Solon points out, "the truth of a piece of content is less important than whether it is shared, liked, and monetized."

Citing Pew Research's survey that found 62% of US adults get their news from social media, Ott expresses alarm, "since the 'news' content on social media regularly features fake and misleading stories from sources devoid of editorial standards." Media critic Alex Ross is similarly alarmed, observing, "Silicon Valley monopolies have taken a hands-off, ideologically vacant attitude toward the upswelling of ugliness on the Internet," and that "the failure of Facebook to halt the proliferation of fake news during the [Trump vs. Clinton] campaign season should have surprised no one. ... Traffic trumps ethics."

O'Callaghan's analysis of Trump's use of social media is that "outrage hits an emotional nerve and is therefore grist to the populist's or the social antagonist's mill. Secondly, the greater and the more widespread the outrage discourse, the more it has a detrimental effect on social capital. This is because it leads to mistrust and misunderstanding amongst individuals and groups, to entrenched positions, to a feeling of 'us versus them'. So understood, outrage discourse not only produces extreme and polarising views but also ensures that a cycle of such views continues. (Consider also in this context Wade Robison (2020) on the 'contagion of passion' and Cass Sunstein (2001, pp. 98–136) on 'cybercascades'.)" Ott agrees, stating that contagion is the best word to describe the viral nature of outrage discourse on social media, and writing that "Trump's simple, impulsive, and uncivil Tweets do more than merely reflect sexism, racism, homophobia, and xenophobia; they spread those ideologies like a social cancer."

Robison warns that emotional contagion should not be confused with the contagion of passions that James Madison and David Hume were concerned with. Robison states they underestimated the contagion of passions mechanism at work in movements, whose modern expressions include the surprising phenomena of rapidly mobilized social media supporters behind both the Arab Spring and the Trump presidential campaign writing, "It is not that we experience something and then, assessing it, become passionate about it, or not", and implying that "we have the possibility of a check on our passions." Robison's view is that the contagion affects the way reality itself is experienced by supporters because it leverages how subjective certainty is triggered, so that those experiencing the contagiously shared alternate reality are unaware they have taken on a belief they should assess.

The roots of Trumpism in the United States can be traced to the Jacksonian era according to scholars Walter Russell Mead, Peter Katzenstein, and Edwin Kent Morris. Eric Rauchway says: "Trumpism—nativism and white supremacy—has deep roots in American history. But Trump himself put it to new and malignant purpose."

Andrew Jackson's followers felt he was one of them, enthusiastically supporting his defiance of politically correct norms of the nineteenth century and even constitutional law when they stood in the way of public policy popular among his followers. Jackson ignored the U.S. Supreme Court ruling in Worcester v. Georgia and initiated the forced Cherokee removal from their treaty protected lands to benefit white locals at the cost of between 2,000 and 6,000 dead Cherokee men, women, and children. Notwithstanding such cases of Jacksonian inhumanity, Mead's view is that Jacksonianism provides the historical precedent explaining the movement of followers of Trump, marrying grass-roots disdain for elites, deep suspicion of overseas entanglements, and obsession with American power and sovereignty, acknowledging that it has often been a xenophobic, "whites only" political movement. Mead thinks this "hunger in America for a Jacksonian figure" drives followers towards Trump but cautions that historically "he is not the second coming of Andrew Jackson," stating that Trump's "proposals tended to be pretty vague and often contradictory," exhibiting the common weakness of newly elected populist leaders, commenting early in his presidency that "now he has the difficulty of, you know, 'How do you govern?'"

Morris agrees with Mead, locating Trumpism's roots in the Jacksonian era from 1828 to 1848 under the presidencies of Jackson, Martin Van Buren and James K. Polk. On Morris's view, Trumpism also shares similarities with the post-World War I faction of the progressive movement which catered to a conservative populist recoil from the looser morality of the cosmopolitan cities and America's changing racial complexion. In his book The Age of Reform (1955), historian Richard Hofstadter identified this faction's emergence when "a large part of the Progressive-Populist tradition had turned sour, became illiberal and ill-tempered."

Prior to World War II, conservative themes of Trumpism were expressed in the America First Committee movement in the early 20th century, and after World War II were attributed to a Republican Party faction known as the Old Right. By the 1990s, it became referred to as the paleoconservative movement, which according to Morris has now been rebranded as Trumpism. Leo Löwenthal's book Prophets of Deceit (1949) summarized common narratives expressed in the post-World War II period of this populist fringe, specifically examining American demagogues of the period when modern mass media was married with the same destructive style of politics that historian Charles Clavey thinks Trumpism represents. According to Clavey, Löwenthal's book best explains the enduring appeal of Trumpism and offers the most striking historical insights into the movement.

Writing in The New Yorker, journalist Nicholas Lemann states the post-war Republican Party ideology of fusionism, a fusion of pro-business party establishment with nativist, isolationist elements who gravitated towards the Republican and not the Democratic Party, later joined by Christian evangelicals "alarmed by the rise of secularism", was made possible by the Cold War and the "mutual fear and hatred of the spread of Communism". An article in Politico has referred to Trumpism as "McCarthyism on steroids".

Championed by William F. Buckley Jr. and brought to fruition by Ronald Reagan in 1980, the fusion lost its glue with the dissolution of the Soviet Union, which was followed by a growth of income inequality in the United States and globalization that "created major discontent among middle and low income whites" within and without the Republican Party. After the 2012 United States presidential election saw the defeat of Mitt Romney by Barack Obama, the party establishment embraced an "autopsy" report, titled the Growth and Opportunity Project, which "called on the Party to reaffirm its identity as pro-market, government-skeptical, and ethnically and culturally inclusive."

Ignoring the findings of the report and the party establishment in his campaign, Trump was "opposed by more officials in his own Party ... than any Presidential nominee in recent American history," but at the same time he won "more votes" in the Republican primaries than any previous presidential candidate. By 2016, "people wanted somebody to throw a brick through a plate-glass window", in the words of political analyst Karl Rove. His success in the party was such that an October 2020 poll found 58% of Republicans and Republican-leaning independents surveyed considered themselves supporters of Trump rather than the Republican Party.

Trumpism has been likened to Machiavellianism and to Benito Mussolini's Italian fascism.

American historian Robert Paxton poses the question as to whether the democratic backsliding evident in Trumpism is fascism or not. As of 2017, Paxton believed it bore greater resemblance to plutocracy, a government which is controlled by a wealthy elite. Paxton changed his opinion following the 2021 storming of the United States Capitol, and stated that it is "not just acceptable but necessary" to understand Trumpism as a form of fascism. Drawing on Umberto Eco's 1995 essay Ur-Fascism, which outlines 14 characteristics of fascism, historian Bret Devereaux discusses how Trumpism satisfies each of the 14. Sociology professor Dylan John Riley calls Trumpism "neo-Bonapartist patrimonialism" because it does not capture the same mass movement appeal of classical fascism to be fascism.

Argentine historian Federico Finchelstein believes significant intersections exist between Peronism and Trumpism because their mutual disregard for the contemporary political system (in the areas of both domestic and foreign policy) is discernible. American historian Christopher Browning considers the long-term consequences of Trump's policies and the support which he receives for them from the Republican Party to be potentially dangerous for democracy. In the German-speaking debate, the term initially appeared only sporadically, mostly in connection with the crisis of confidence in politics and the media and described the strategy of mostly right-wing political actors who wish to stir up this crisis in order to profit from it. German literature has a more diverse range of analysis of Trumpism.

In How to Lose a Country: The 7 Steps from Democracy to Dictatorship, Turkish author Ece Temelkuran describes Trumpism as echoing a number of views and tactics which were expressed and used by the Turkish politician Recep Tayyip Erdoğan during his rise to power. Some of these tactics and views are right-wing populism, demonization of the press, subversion of well-established and proven facts through the big lie (both historical and scientific), democratic backsliding such as dismantling judicial and political mechanisms; portraying systematic issues such as sexism or racism as isolated incidents, and crafting an ideal citizen.

Political scientist Mark Blyth and his colleague Jonathan Hopkin believe strong similarities exist between Trumpism and similar movements towards illiberal democracies worldwide, but they do not believe Trumpism is a movement which is merely being driven by revulsion, loss, and racism. Hopkin and Blyth argue that both on the right and on the left the global economy is driving the growth of neo-nationalist coalitions which find followers who want to be free of the constraints which are being placed on them by establishment elites whose members advocate neoliberal economics and globalism.

Others emphasize the lack of interest in finding real solutions to the social malaise which have been identified, and they also believe those individuals and groups who are executing policy are actually following a pattern which has been identified by sociology researchers like Leo Löwenthal and Norbert Guterman as originating in the post-World War II work of the Frankfurt School of social theory. Based on this perspective, books such as Löwenthal and Guterman's Prophets of Deceit offer the best insights into how movements like Trumpism dupe their followers by perpetuating their misery and preparing them to move further towards an illiberal form of government.

Trump is considered by some analysts to be following a blueprint of leveraging outrage, which was developed on partisan cable TV and talk radio shows such as the Rush Limbaugh radio show—a style that transformed talk radio and American conservative politics decades before Trump. Both shared "media fame" and "over-the-top showmanship", and built an enormous fan base with politics-as-entertainment, attacking political and cultural targets in ways that would have been considered indefensible and beyond the pale in the years before them. Both featured "the insults, the nicknames", and conspiracy theories. Both maintained global warming was a hoax, Barack Obama was not a natural-born U.S. citizen, and the danger of COVID-19 was vastly exaggerated by liberals. Both mocked people with disabilities.

Limbaugh, to whom Trump awarded the Presidential Medal of Freedom in 2020, preceded Trump in moving the Republican Party away from "serious and substantive opinion leaders and politicians", towards political provocation, entertainment, and anti-intellectualism, and popularizing and normalizing for "many Republican politicians and voters" what before his rise "they might have thought" but would have "felt uncomfortable saying". His millions of fans were intensely loyal and "developed a capacity to excuse ... and deflect" his statements no matter how offensive and outrageous, "saying liberals were merely being hysterical or hateful. And many loved him even more for it."

Writing in The Atlantic, Yaseem Serhan states Trump's post-impeachment claim that "our historic, patriotic, and beautiful movement to Make America Great Again has only just begun," should be taken seriously as Trumpism is a "personality-driven" populist movement, and other such movements—such as Berlusconism in Italy, Peronism in Argentina and Fujimorism in Peru, "rarely fade once their leaders have left office". Joseph Lowndes, a professor of political science at the University of Oregon, argued that while current far-right Republicans support Trump, the faction rose before and will likely exist after Trump. Bobby Jindal and Alex Castellanos wrote in Newsweek that separating Trumpism from Donald Trump himself was key to the Republican Party's future following his loss in the 2020 United States presidential election.

In 2024, President Kevin Roberts of The Heritage Foundation stated that he sees the role of Heritage as "institutionalizing Trumpism."

In terms of economic policy, Trumpism "promises new jobs and more domestic investment". Trump's hard line against export surpluses of American trading partners and general protectionist trade policies led to a tense situation in 2018 with mutually imposed punitive tariffs between the United States on the one hand and the European Union and China on the other. Trump secures the support of his political base with a policy that strongly emphasizes neo-nationalism and criticism of globalization. In contrast, the book Identity Crisis: The 2016 Presidential Campaign and the Battle for the Meaning of America suggested that Trump "radicalized economics" to his base of white working- to middle-class voters by the promoting the idea that "undeserving [minority] groups are getting ahead while their group is being left behind."

In terms of foreign policy in the sense of Trump's "America First", unilateralism and isolationism is preferred to a multilateral policy. National interests are particularly emphasized, especially in the context of economic treaties and alliance obligations. Trump has shown a disdain for traditional American allies such as Canada as well as transatlantic partners NATO and the European Union. Conversely, Trump has shown sympathy for autocratic rulers, such as Russian president Vladimir Putin, whom Trump often praised even before taking office, and during the 2018 Russia–United States summit. The "America First" foreign policy includes promises by Trump to end American involvement in foreign wars, notably in the Middle East, while also issuing tighter foreign policy through sanctions against Iran, among other countries.

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According to Global News, Maclean's magazine, the National Observer, Toronto Star, and The Globe and Mail, there is Trumpism in Canada. In a November 2020 interview on The Current, immediately following the 2020 US elections, law professor Allan Rock, who served as Canada's attorney general and as Canada's ambassador to the U.N., described Trumpism and its potential impact on Canada. Rock said that even with Trump's losing the election, he had "awakened something that won't go away". He said it was something "we can now refer to as Trumpism"—a force that he has "harnessed" Trump has "given expression to an underlying frustration and anger, that arises from economic inequality, from the implications from globalisation."

Rock cautioned that Canada must "keep up its guard against the spread of Trumpism", which he described as "destabilizing", "crude", "nationalistic", "ugly", "divisive", "racist", and "angry"; Rock added that one measurable impact on Canada of the "overtly racist behaviour" associated with Trumpism is that racists and white supremacists have become emboldened since 2016, resulting in a steep increase in the number of these organizations in Canada and a shockingly high increase in the rate of hate crimes in 2017 and 2018 in Canada.

Maclean's and the Star, cited the research of Frank Graves who has been studying the rise of populism in Canada for a number of years. In a June 30, 2020 School of Public Policy journal article, he co-authored, the authors described a decrease in trust in the news and in journalists since 2011 in Canada, along with an increase in skepticism which "reflects the emergent fake news convictions so evident in supporters of Trumpian populism." Graves and Smith wrote of the impact on Canada of a "new authoritarian, or ordered, populism" that resulted in the 2016 election of President Trump. They said 34% of Canadians hold a populist viewpoint—most of whom are in Alberta and Saskatchewan—who tend to be "older, less-educated, and working-class", are more likely to embrace "ordered populism", and are "more closely aligned" with conservative political parties. This "ordered populism" includes concepts such as a right-wing authoritarianism, obedience, hostility to outsiders, and strongmen who will take back the country from the "corrupt elite" and return it a better time in history, where there was more law and order. It is xenophobic, does not trust science, has no sympathy for equality issues related to gender and ethnicity, and is not part of a healthy democracy. The authors say this ordered populism had reached a "critical force" in Canada that is causing polarization and must be addressed.

According to an October 2020 Léger poll for 338Canada of Canadian voters, the number of "pro-Trump conservatives" has been growing in Canada's Conservative Party, which was under the leadership of Erin O'Toole at the time of the poll. Maclean's said this might explain O'Toole's "True Blue" social conservative campaign. The Conservative Party in Canada also includes "centrist" conservatives as well as Red Tories,—also described as small-c conservative, centre-right or paternalistic conservatives as per the Tory tradition in the United Kingdom. O'Toole featured a modified version of Trump's slogan—"Take Back Canada"—in a video released as part of his official leadership candidacy platform. At the end of the video he called on Canadians to "[j]oin our fight, let's take back Canada."

In a September 8, 2020 CBC interview, when asked if his "Canada First" policy was different from Trump's "America First" policy, O'Toole said, "No, it was not." In his August 24, 2019 speech conceding the victory of his successor Erin O'Toole as the newly elected leader of the Conservative Party, Andrew Scheer cautioned Canadians to not believe the "narrative" from mainstream media outlets but to "challenge" and "double check ... what they see on TV on the internet" by consulting "smart, independent, objective organizations like The Post Millennial and True North. The Observer said Jeff Ballingall, who is the founder of the right-wing Ontario Proud, and is also the Chief Marketing Officer of The Post Millennial.

Following the 2020 United States elections, National Post columnist and former newspaper "magnate", Conrad Black, who had had a "decades-long" friendship with Trump, and received a presidential pardon in 2019, in his columns, repeated Trump's "unfounded claims of mass voter fraud" suggesting that the election had been stolen.

Trumpism has also been said to be on the rise in Europe. Political parties such as the Finns Party, France's National Rally and Spain's far-right Vox party have been described as Trumpist in nature. Trump's former advisor Steve Bannon called Hungarian prime minister Viktor Orbán "Trump before Trump". Isabel Díaz Ayuso has also received the Trumpism label.

In Brazil, Jair Bolsonaro, sometimes referred to as the "Brazilian Donald Trump", who is often described as a right-wing extremist, sees Trump as a role model and according to Jason Stanley uses the same fascist tactics. Like Trump, Bolsonaro finds support among evangelicals for his views on culture war issues. Along with allies he publicly questioned Joe Biden's vote tally after the November election.

Javier Milei, an Argentinian Austrian economist who was elected in 2023 as President of Argentina has sometimes been likened to Donald Trump. Many other commentators have stressed that the two men are different, however, describing Milei's views as mostly libertarian, such as rejecting protectionism and supporting free trade.

According to The Guardian and The Washington Post, there is a significant affinity towards Trump in Nigeria. Donald Trump's comments on the ethno-religious conflicts between Christians and the predominantly Muslim Fulani tribe has contributed to his popularity among Christians in Nigeria, in which he stated: "We have had very serious problems with Christians who are being murdered in Nigeria. We are going to be working on that problem very, very hard because we cannot allow that to happen". Donald Trump is praised by the Indigenous People of Biafra (IPOB), a secessionist group that supports the independence of Biafra from Nigeria and is designated as a terrorist group by the Nigerian government. IPOB has claimed that he "believes in the inalienable right of an indigenous people to self-determination" and it also praised him for "the direct and serious manner he addressed and demanded immediate end to the serial slaughter of Christians in Nigeria, especially Biafran Christians".

After Trump's victory in the 2016 presidential election, IPOB leader Nnamdi Kanu wrote a letter to Trump that claimed his victory placed upon him a "historic and moral burden ... to liberate the enslaved nations in Africa". As Trump was inaugurated in January 2017, IPOB organized a rally in support of Trump that resulted in violent clashes with Nigerian security forces and resulted in multiple deaths and arrests. On January 30, 2020, IPOB leader Nnamdi Kanu attended a Trump rally in Iowa as a special VIP guest, at the invitation of the Republican Party of Iowa. According to a 2020 poll from Pew Research, 58% of Nigerians had favorable views of Donald Trump, the fourth highest percentage globally.

According to John Campbell of Council on Foreign Relations, Trump's popularity in Nigeria can be explained by a "manifestation of the widespread disillusionment in a country characterized by growing poverty, multiple security threats, an expanding crime wave, and a government seen as unresponsive and corrupt", and his popularity is likely to be reflective of wealthier urban Nigerians rather than the majority of Nigerians who live in rural areas or urban slums and are unlikely to have strong opinions on Trump.

Donald Trump and his policy towards Iran has been praised by the Iranian opposition group 'Restart', led by Mohammad Hosseini, which also supports American military action against Iran and offered to fight alongside Americans to overthrow the Iranian government. The group has adopted the slogan "Make Iran Great Again".

Restart has been compared to QAnon by Ariane Tabatabai, in terms of "conspiracist thinking going global". Among conspiracy theories advocated by the group is that Iran's Supreme Leader Ali Khamenei has died (or went into coma) in 2017 and a double plays his role in public.

In Japan, in a speech to Liberal Democratic Party lawmakers in Tokyo on 8 March 2019, Steve Bannon said that Prime Minister Shinzo Abe was "Trump before Trump" and "a great hero to the grassroots, the populist, and the nationalist movement throughout the world." Shinzo Abe was described as a "right-wing nationalist" or "ultra-nationalist", but whether he was a "populist" is controversial.

Netto-uyoku is the term used to refer to netizens who espouse ultranationalist far-right views on Japanese social media, as well as in English to those who are proficient. Netto-uyoku are typically very friendly not only to Japanese nationalists but also to Donald Trump, and oppose liberal politics. They began spreading Trump's conspiracy theories in an attempt to overturn the 2020 American presidential election.

The politics of Yoon Suk Yeol, the president of South Korea, has been called "Trumpist" for his right-wing populist elements.

Sheila S. Coronel has argued that the political strategies of Ferdinand Marcos, who was President of the Philippines from 1965 to 1986, and Rodrigo Duterte, who held the same position from 2016 to 2022, share certain features with Trumpism, including disregard for facts, encouragement of fear, and a "loud, bombastic, hypermasculine" aesthetic; and that each has benefited from uncertain political environments.