[24][25] After the election, more than 2,000 organizations removed Breitbart News from ad buys following Internet activism campaigns denouncing the site's controversial positions.

The website featured direct links to wire stories at the Associated Press, Reuters, Fox News, the New York Post, TMZ as well as a number of other outlets.

[4] Breitbart News exclusively re-posted the Anthony Weiner sexting scandal, the resignation of Shirley Sherrod, and the ACORN 2009 undercover videos controversy.

[39] An October 2012 article in BuzzFeed News suggested there were internal tensions in the organisation in the year after Andrew Breitbart's death as staffers battled for ownership of his legacy.

"[49] In August 2015, an article in BuzzFeed reported that several anonymous Breitbart News staffers claimed that Donald Trump had paid for favorable coverage on the site.

[23] A 2017 study by the Berkman Klein Center for Internet & Society at Harvard University found that Breitbart News was the most shared source by Trump supporters on Twitter during the election.

[67] Milo Yiannopoulos, who had served as a senior editor of Breitbart News since 2014, resigned from the company on February 21, 2017 after a video of him making controversial statements in relation to hebephilia surfaced.

[87][27][28][86] Soon thereafter, Breitbart News trimmed prominently displayed, overtly racist content and fired contributor Katie McHugh for posting Islamophobic tweets about the 2017 London Bridge attack.

[46] It supported Donald Trump's 2016 presidential campaign,[23] and political scientist Matthew Goodwin described Breitbart News as being "ultra-conservative" in orientation.

[46] The Anti-Defamation League described Breitbart News as "the premier website of the alt-right" representing "white nationalists and unabashed anti-Semites and racists.

An exposé by BuzzFeed News published in October 2017 documented how Breitbart solicited story ideas and copy edits from white supremacists and neo-Nazis via the intermediation of Milo Yiannopoulos.

"[108] In November 2017, British anti-fascism charity Hope Not Hate identified one of the website's writers as an administrator of a far-right Facebook group that serves as a platform for fascists and white supremacists.

[122] In 2009, the site used audio from a conference call to accuse the National Endowment of the Arts of encouraging artists to create work in support of President Barack Obama's domestic policy.

[132][133] It was initially edited by Milo Yiannopoulos, who was recruited by Bannon, until his resignation on February 21, 2017, following the controversy surrounding questionable comments he made regarding hebephilia and the sexuality of children during two podcasts.

However, a former Massachusetts Attorney General hired to investigate the matter found no pattern of illegal conduct by the ACORN employees and said the news media should have been far more skeptical, demanding the raw video from which the edited versions were produced.

[165] On May 28, 2011, Breitbart News's BigJournalism website reported on a sexually explicit photo linked on New York Representative Anthony Weiner's Twitter feed.

On February 7, 2013, Ben Shapiro published an article on Breitbart News reporting allegations that former Senator and nominee for United States Secretary of Defense Chuck Hagel (R-Nebraska) may have been paid to speak at an event sponsored by a group called "Friends of Hamas".

[168] On February 19, New York Daily News reporter Dan Friedman said that the story had originated from a sarcastic comment he had made to a congressional staffer.

[172][173] Writers for The Washington Post,[174] New York magazine[173] and The Daily Beast[175] criticized Breitbart News for the "Friends of Hamas" story, calling it "wrong" and "made-up".

[180] Andrew Rosenthal of The New York Times editorial page editor criticized this, writing: "The appended correction didn't really do justice to the scope of the misidentification.

"[181] The American Journalism Review said "that Breitbart had let the mistaken fact stand in the headline and the article itself," and had published a second story containing the incorrect information on November 9.

[10] In March 2017, Breitbart News published a story by conservative talk radio host Mark Levin claiming that Obama had wiretapped Donald Trump during his 2016 presidential campaign.

[191][192] A June 2016 Breitbart News article presented Stone's conspiracy theory that Clinton aide Huma Abedin was involved with terrorism.

[193] On January 3, 2017, Breitbart News's Virginia Hale wrote that "At New Year's Eve celebrations in Dortmund a mob of more than 1,000 men chanted 'Allahu Akhbar', launched fireworks at police, and set fire to a historic church".

While 1000 people did gather, which is not unusual on New Year's Eve in a public place, video footage from the scene does not show a "mob", and no policemen were targeted.

[198][204][205][206] Breitbart News initially declined to comment,[196][207] but later updated its story to state that it stood by its claims, which had been shown to be false, and the only correction issued was with regard to the church's age.

They also reiterated the accusation against Breitbart News of exaggerating minor facts to give a false "impression that a 'mob' of 1000 migrants had shot at Christian churches in Dortmund and set them on fire.

[215] In November 2021, a study by the Center for Countering Digital Hate described Breitbart News as being among "ten fringe publishers" that together were responsible for nearly 70 percent of Facebook user interactions with content that denied climate change.

[216][217][218] In August 2017, Breitbart News featured a picture of professional German soccer player Lukas Podolski in an article entitled "Spanish Police Crack Gang Moving Migrants on Jet-Skis".

"[222] Breitbart News livestreamed a widely viewed video on July 27, 2020, featuring a group called America's Frontline Doctors, that made dubious claims related to the COVID-19 pandemic and touted hydroxychloroquine as a cure.