Fox News host hits Giuliani: Dossier isn't why Mueller probe was started

Fox News host Shep Smith on Wednesday fact-checked President TrumpDonald John TrumpMcCabe says he was fired because he 'opened a case against' Trump McCabe: Trump said 'I don't care, I believe Putin' when confronted with US intel on North Korea McCabe: Trump talked to me about his election victory during 'bizarre' job interview MORE's lawyer Rudy Giuliani after he again claimed that special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe 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 BrennanJohn Owen BrennanOvernight Defense: Trump declares border emergency | .6B in military construction funds to be used for wall | Trump believes Obama would have started war with North Korea | Pentagon delivers aid for Venezuelan migrants Trump: I believe Obama would have gone to war with North Korea Intel agencies' threat assessment matters more than tiff with Trump 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 PapadopoulosSchiff: Evidence of collusion between Trump campaign, Russia 'pretty compelling' Drama hits Senate Intel panel’s Russia inquiry Fox & Friends host says program will ‘absolutely’ accept Mueller report findings MORE told an Australian diplomat that the Russians had dirt on his then-political opponent Hillary ClintonHillary Diane Rodham ClintonFemale Dems see double standard in Klobuchar accusations Klobuchar, O'Rourke visit Wisconsin as 2020 race heats up McCabe's shocking claims prove the bloodless coup rolls on MORE. That information was passed on to intelligence officials." 

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.