(CNN) -- Special counsel Robert Mueller has memos written by former FBI Deputy Director Andrew McCabe documenting his conversations with President Donald Trump, a source with knowledge of the matter told CNN.
The memos also detail what former FBI Director James Comey told McCabe about his own interactions with Trump while he was FBI director and are seen as a way to corroborate Comey's account in Mueller's probe on Russian interference in the 2016 election.
Attorney General Jeff Sessions fired McCabe on Friday, about a day before his 50th birthday and the date he was set to retire and begin receiving his anticipated pension, over accusations that McCabe directed FBI officials to speak to the media about an investigation tied to the Clinton Foundation and misled investigators about his actions. Following his firing Friday, McCabe told CNN in an interview that he had four interactions with the President last May, while he was acting FBI director.
McCabe revealed that he had three in-person interactions and one phone call with Trump, in which the President berated him each time about his wife's failed Virginia Senate campaign.
It is unclear exactly what is in McCabe's memos and if he memorialized every interaction he had with the President.
"In May, when Director Comey was fired and I had my own interactions with the President, he brought up my wife every time I ever spoke to him," McCabe told CNN. "Of course, I disagreed with him."
McCabe also confirmed that the President asked him who he voted for in the 2016 election, which was reported back in January and which Trump denied.
The former No. 2 official at the FBI told CNN that Trump did not bring up the agency's investigation into Russia meddling in the 2016 election.
Comey revealed last year that he had kept memos while he was still FBI director about meetings and conversations he had with the President. Comey said his memos detailed conversations in which Trump asked Comey to pledge loyalty to him, state publicly that the FBI was not investigating Trump himself, and urged Comey to "let this go," referring to the then-investigation involving Trump's former national security adviser Michael Flynn.
Trump has denied several of Comey's claims.
During his testimony on Capitol Hill last June, Comey acknowledged orchestrating the leak of his memos to the media a few days after he was fired in hopes that the Justice Department would appoint a special counsel.
The former FBI director's memos have also been handed over to the special counsel.
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