Fox News host Shep Smith on Wednesday fact-checked President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE's lawyer Rudy Giuliani after he again claimed that special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's investigation started with the so-called Steele dossier.

In an interview on Fox News on Monday, Giuliani claimed that former CIA Director John Brennan John Owen BrennanJournalism or partisanship? The media's mistakes of 2016 continue in 2020 Comey on Clinton tweet: 'I regret only being involved in the 2016 election' Ex-CIA Director Brennan questioned for 8 hours in Durham review of Russia probe MORE brought the dossier to the special counsel's attention, kicking off the more than yearlong investigation into possible ties between the Trump campaign and Russia.

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"Much of Giuliani’s attack on Brennan involved the dossier compiled by the former British spy Christopher Steele, that the administration has repeatedly asserted was what began the Russia investigation," Smith said on Wednesday.

"It was not," Smith continued. "The Russia investigation began after the former Trump policy adviser George PapadopoulosGeorge Demetrios PapadopoulosTale of two FBI cases: Clinton got warned, Trump got investigated Trump says he would consider pardons for those implicated in Mueller investigation New FBI document confirms the Trump campaign was investigated without justification MORE told an Australian diplomat that the Russians had dirt on his then-political opponent Hillary Clinton Hillary Diane Rodham ClintonFox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio Trump, Biden court Black business owners in final election sprint The power of incumbency: How Trump is using the Oval Office to win reelection MORE. That information was passed on to intelligence officials."

Sean Hannity lies about the Russia investigation at night on Fox News, Shep Smith debunks his false claims during the day pic.twitter.com/lOoOxuD2IH — Media Matters (@mmfa) August 15, 2018

Giuliani, who often claims Mueller's probe began with the Steele dossier, on Monday said Brennan is the mastermind behind Mueller's investigation.

Two days later, Trump revoked Brennan's security clearance.

"The guy running it is Brennan," Giuliani said Monday. "Brennan took an affidavit, a dossier that unless he's the biggest idiot intelligence agent that ever existed — although he never did much intelligence work — it's false. You can look at it and laugh at it."



"That led to the request for the investigation," he continued. "So, he takes a false affidavit, a false dossier, he gets the senators involved, and a couple of Republican senators, and they demand an investigation. A totally phony investigation."

Smith cast doubt on Giuliani's assertions that the dossier is "laughable."

"For context, the research in the dossier includes 17 memos produced by the former spy Christopher Steele," Smith said. "They allege misconduct and a conspiracy between members of the Trump campaign and the Russian government during the 2016 election."

"Some assertions in the dossier have been confirmed," he continued. "Other parts are unconfirmed."

"None of the dossier, to Fox News’s knowledge, has been disproven," Smith added.

Multiple former intelligence officials have said the dossier did not instigate the FBI’s investigation into Russia's election interference or provide a basis for the intelligence community assessment.

Trump's associates have sought to write off the investigation as a "hoax" and a "witch hunt" since its beginning. The probe so far has resulted in indictments or guilty pleas for 32 people and three Russian companies.

Updated on Aug. 16 at 6:31 a.m.