[10] CNN reported in April 2022 that two days after the election, Trump Jr. sent a text message to White House Chief of Staff Mark Meadows outlining paths to subvert the Electoral College process and ensure his father a second term.

As a boy, Trump found a role model in his maternal grandfather, Miloš Zelníček, who had a home near Prague, where he spent summers camping, fishing, hunting and learning the Czech language.

[13] In 2010, he became a spokesperson and "executive director of global branding" for Cambridge Who's Who, a vanity publisher against whom hundreds of complaints had already been filed with the Better Business Bureau.

[33][34] Ahead of the 2016 presidential election, Trump Jr. was a central member of his father's campaign,[35] characterized by The New York Times as a "close political adviser".

[37][38] Since his father's victory in the 2016 election, Trump Jr. has developed what The Washington Post calls a "public persona as a right-wing provocateur and ardent defender of Trumpism".

[41][42] On June 9, 2016, Trump Jr. attended a meeting arranged by publicist Rob Goldstone on behalf of Azerbaijani-Russian businessman Emin Agalarov.

[43] The meeting was held in Trump Tower in Manhattan, among three members of the presidential campaign: Trump Jr., Jared Kushner, and Paul Manafort – and Russian lawyer Natalia Veselnitskaya, her translator Anatoli Samochornov, Russian-American lobbyist Rinat Akhmetshin, and Ike Kaveladze, a Georgian-American, U.S.-based senior vice president at Crocus Group, the real estate development company run by Aras Agalarov.

WikiLeaks asked Trump Jr. to share a made-up[57] claim by True Pundit that Hillary Clinton had wanted to attack Assange with drones.

[60] In April 2017, he campaigned for Montana congressional candidate Greg Gianforte,[61] and in May met with Republican National Committee officials to discuss the party's strategy and resources.

[62] In September 2017, Trump Jr. asked to have his Secret Service detail removed, telling friends he wanted more privacy, the second presidential child to do so.

[65] In the same month, Trump Jr. held a crowded indoor rally where attendees did not wear masks, contradicting public health guidelines.

[66] In an October 29 interview with Fox News's Laura Ingraham, Trump Jr. asserted that the coronavirus death rate has dropped to "almost nothing", adding "(b)ecause we've gotten control of this thing.

[79] As a consequence of the interview, mainstream media outlets have accused Trump Jr. of being either a believer in the white genocide conspiracy theory,[80] or pretending to be an advocate for political gain.

[87][88] In August 2020, the Southern Poverty Law Center reported that Trump Jr. appeared at a far-right "We Build the Wall" event with Jack Posobiec in July 2019.

[89] Trump Jr. retweeted conspiratorial remarks by white supremacist Kevin B. MacDonald about alleged favors exchanged by Hillary Clinton and Switzerland's largest bank.

[36] On the campaign trail, Trump Jr. promoted Alex Jones' conspiracy theory that Hillary Clinton wore an earpiece to a presidential forum[90][91][92] and that official unemployment rates were manipulated for political purposes.

[94] In May 2017, Trump Jr. promoted what CNN called the "long-debunked, far-right conspiracy theory" that Bill Clinton was linked to Vince Foster's death.

[98] In February 2018, Trump Jr. liked two tweets promoting a conspiracy theory that survivors of the Stoneman Douglas High School shooting were coached into propagating anti-Trump rhetoric.

[99][100] In May 2018, Trump Jr. retweeted a false and antisemitic conspiracy theory that George Soros, the Jewish Hungarian-American businessman and philanthropist, was a "nazi [sic] who turned in his fellow Jews to be murdered in German concentration camps & stole their wealth".

[110] In September 2020, he again pushed false claims about voter fraud by asserting, "The radical left are laying the groundwork to steal this election from my father".

[128] In June 2020, during the COVID-19 pandemic, Trump Jr. accused liberals of hypocrisy, for imposing restrictive measures and social distancing guidelines on businesses while holding the "Action for Black Trans Lives" protest for the rights of African American transgender people.

[8] CNN reported in April 2022 that two days after the election, Trump Jr. sent a text message to White House Chief of Staff Mark Meadows outlining paths to subvert the Electoral College process and ensure his father a second term.

[11][132] Together with his father and other speakers, on January 6, 2021, Trump Jr. spoke to an audience and, speaking about reluctant GOP lawmakers saying, "If you're gonna be the zero and not the hero, we're coming for you".

[134] Television host and former congressman Joe Scarborough called for the arrest of Trump Jr., along with his father and Rudolph Giuliani, for insurrection against the United States.

[135] Following his father's permanent ban from Twitter on January 8, 2021, Donald Trump Jr. claimed that free speech "no longer exists in America".

[143] In a review for The Washington Post, Carlos Lozada said that it "fails as memoir and as polemic: its analysis is facile, its hypocrisy relentless, its self-awareness marginal (the writing is wretched, even by the standards of political vanity projects)".

[147] Trump Jr. explained to The New York Times his reasons: "While I had no plans for a book this year, I was stuck indoors like the rest of the nation during the pandemic", he said, adding that he "decided to highlight Biden's half century of being a swamp monster, since the media wouldn't do it".

[174] ProPublica revealed on December 11, 2019, that the government of Mongolia retroactively granted Trump Jr. a hunting permit for the endangered Argali mountain sheep.

[175] The sheep hunt and travel to Ulaanbaatar for a private meeting with Mongolian president Khaltmaagiin Battulga cost US taxpayers $76,859.36 for United States Secret Service protection,[176] according to two Freedom of Information Act requests by the Citizens for Responsibility and Ethics in Washington (CREW).

[177][178] Humane Society International wildlife vice president Teresa Telecky said, "For trophy hunters to travel to Mongolia to kill a beautiful and endangered ram is an absolute outrage".