Former FBI Director James ComeyJames Brien ComeySarah Sanders addresses false statements detailed in Mueller report: 'A slip of the tongue' Comey tweets 'so many answers' following release of Mueller report Dems plan Monday call on Mueller report: 'Congress will not be silent' MORE asserted Thursday evening that he did not know beyond news reports that Hillary ClintonHillary Diane Rodham ClintonClinton campaign chief: Mueller report 'lays out a devastating case' against Trump Hillicon Valley: Cyber, tech takeaways from Mueller report | Millions of Instagram passwords exposed internally by Facebook | DHS unrolling facial recognition tech in airports | Uber unveils new safety measures after student's killing Heavily redacted Mueller report leaves major questions unanswered MORE's campaign had paid for research that led to a dossier of unverified allegations about President TrumpDonald John TrumpButtigieg on Mueller report: 'Politically, I'm not sure it will change much' Sarah Sanders addresses false statements detailed in Mueller report: 'A slip of the tongue' Trump to visit Japan in May to meet with Abe, new emperor MORE's ties to Russia.

"When did you learn that the [Democratic National Committee] DNC and Hillary Clinton campaign had funded Christopher Steele's work?" Fox News anchor Brett Baier asked Comey on "Special Report," referring to the dossier compiled by Steele, a former British spy.

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"I still don't know that for a fact," Comey responded. "I've only seen it in the media. I never knew exactly which Democrats had funded. I knew it was funded first by Republicans."

"That's not true," Baier interjected, referring to funding by Republicans.

"My understanding is that his work started ... as oppo research funded by Republicans," Comey maintained, adding the activity was "then picked up by Democrats opposed to Donald Trump."

The Washington Free Beacon, a conservative publication, confirmed to the House Intelligence Committee in October that it originally funded the Trump project through the opposition research firm Fusion GPS. 

The project until that point had focused on researching multiple Republican presidential candidates and was not looking at collusion with Russia, the Free Beacon said.

The Free Beacon maintained that none of the work product it received from Fusion GPS appeared in the dossier and the publication said it did not pay for any work performed by Steele, suggesting he became involved after the publication stopped funding the project.

The unverified dossier compiled by Steele contains salacious details about Trump's 2013 trip to Moscow for the Miss Universe pageant. 

Democrats argue the dossier provides a framework into Trump's alleged ties to Russia, while Republicans say the document is politically motivated.