[1][2] His two New York Times best-selling books, Unfit for Command (2004) and The Obama Nation (2008), attacked Democratic presidential candidates and have been criticized by opposition.

[11][12] In 2018, Corsio was subpoenaed by the Mueller special counsel investigation over his contacts with former Donald Trump adviser Roger Stone and foreknowledge of WikiLeaks releases of stolen Clinton emails.

[22] In January 2005, Corsi told the Boston Herald that he planned to run for John Kerry's Senate seat in Massachusetts in 2008 as a Republican or Independent candidate.

[28] The Office of the Special Counsel reportedly has information suggesting Corsi possessed advance knowledge that WikiLeaks had obtained the hacked emails of John Podesta.

Gray attributed Corsi's shifting stories to a poor memory and his well-established habit of picking "truthful facts woven in a way that you don't have to worry about the things that are inconsistent".

Corsi had been attempting to e-mail Vladimir Zelenko, who made exaggerated claims about hydroxychloroquine-antibiotic-zinc cocktails and their alleged efficacy in treating COVID-19 that were not supported by peer-reviewed evidence.

[40] According to The Guardian in 2008, Corsi has been accused by the American press "of being anti-Islamic, anti-Catholic, anti-Semitic and homophobic, and of exploiting racial prejudices in an attempt to 'scare white America'".

In 2006, he co-authored Showdown with Nuclear Iran: Radical Islam's Messianic Mission to Destroy Israel and Cripple the United States with Michael D. Evans.

This book criticized President George W. Bush's border protection policies, accusing him of furthering plans to create a North American Union.

[45][46] On August 15, 2008, Corsi endorsed Constitution Party presidential candidate Chuck Baldwin, who had campaigned to reopen the investigation into the September 11, 2001 attacks in support of the 9/11 Truth movement.

Kerry gained notoriety, the book argues, by bringing to light such horrific events as the My Lai Massacre, thus damaging the image of the U.S. Military in the Winter Soldier hearings.

[60] In 2007 Corsi, along with Bill Gertz, Lt. Col. Robert (Buzz) Patterson, Joel Mowbray, and Richard Miniter, sued Regnery's parent company, Eagle Publishing, claiming the company "orchestrate[d] and participate[d] in a fraudulent, deceptively concealed and self-dealing scheme to divert book sales away from retail outlets and to wholly owned subsidiary organizations within the Eagle conglomerate".

[64][65][66][67][68] According to The New York Times, "Significant parts of the book, whose subtitle is 'Leftist Politics and the Cult of Personality,' have been challenged in the days since its debut on Aug.

[69] Corsi conducted over 100 interviews promoting the book,[68] including a scheduled appearance[70] on The Political Cesspool, a white supremacist[71][72] radio talk show.

[75] In a debate with Corsi on Larry King Live, Paul Waldman, a senior fellow at Media Matters for America, accused him of using "baseless innuendo" as a tactic to "smear" Obama.

[76] On October 7, 2008, Corsi and his media consultant Tim Bueler were detained by immigration authorities in Kenya while engaged in further research related to the book, allegedly for failure to have a work permit.

[84] In 2005 Corsi's Atomic Iran: How the Terrorist Regime Bought the Bomb and American Politicians was published by WND Books with an introduction by Craig R. Smith, Chairman of the Board of Owens & Minor.

[42] To promote the book, Corsi appeared in conservative venues such as on Hannity & Colmes on April 8, 2005, at The Heritage Foundation,[85] and on WEJEW Radio.

"[89][90] Corsi continued to cast doubt on Obama's birth certificate during a March 2019 CNN interview, telling Anderson Cooper, "I want to see the original 1961 birth records from Kenya, that'll settle it...the State of Hawaii will not show those records to anyone.” Corsi's attorney, Larry Klayman, falsely asserted during the same interview, "the birth certificate uses the word ‘African-American’ in 1961.”[91][92] Corsi claimed that "President Bush is pursuing a globalist agenda to create a North American Union", a theoretical continental union of Canada, Mexico, and the United States, that will supplant the United States.

[94] The "Union" is a theme in two of his books The Late Great U.S.A.: The Coming Merger with Mexico and Canada[95] (2007) and Minutemen: The Battle to Secure America's Borders (2006) as he explained on The Conservative Caucus's TV show.

[43] The validity of those claims was criticized in Newsweek and the author noted: "Corsi offered a warning: President Bush's supposed determination to force North American integration, he told the audience, could cost the GOP the 2008 presidential election.

"[96] John Hawkins, a fellow writer for Human Events, responded: "Yesterday, Jerome Corsi was prattling on about the North American Union again after Michael Medved deservedly spanked him for spreading conspiracy theories.

[99] Corsi cited Jones's findings of microscopic forensic evidence that seemingly negated the U.S. government hypothesis that the aircraft's jet fuel-fed heat alone was sufficiently hot to collapse the steel superstructure of the buildings.

According to the publisher's description, the book explores claims made in 2009 by three U.S. professors who believe that Adolf Hitler did not die in 1945, and instead escaped Berlin.