White House counsel Donald McGahn Donald (Don) F. McGahnCongress hits rock bottom in losing to the president in subpoena ruling Rudy Giuliani's reputation will never recover from the impeachment hearings In private moment with Trump, Justice Kennedy pushed for Kavanaugh Supreme Court nomination: book MORE believes he "did not incriminate" 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 in wrongdoing during his 30 hours of interviews with 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, McGahn's lawyer has said in recent days, according to The Washington Post.

McGahn's attorney, Bill Burck, reportedly told Trump's legal team that McGahn did not accuse Trump of criminal behavior during his three sit-downs with Mueller.

“He did not incriminate him,” Burck wrote in an email described by multiple people to the Post.

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Burck said McGahn would have resigned from the White House if he had seen the president engage in criminal wrongdoing.

He also told Trump's legal team that he is unsure what other witnesses have shared, meaning he is unsure how McGahn's testimony will fit into a case against Trump.

The New York Times this week reported that McGahn has been cooperating with Mueller in his probe into possible collusion between the Trump campaign and Russia. His interviews focused on Trump’s firing of former FBI Director James Comey James Brien ComeySteele Dossier sub-source was subject of FBI counterintelligence probe Judge will not dismiss McCabe's case against DOJ Democrats fear Russia interference could spoil bid to retake Senate MORE last year, the president's repeated urging of Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsRoy Moore sues Alabama over COVID-19 restrictions GOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs MORE to claim control of the special counsel's probe, and his suggestion he might fire Deputy Attorney General Rod Rosenstein Rod RosensteinDOJ kept investigators from completing probe of Trump ties to Russia: report Five takeaways from final Senate Intel Russia report FBI officials hid copies of Russia probe documents fearing Trump interference: book MORE, it added.

Mueller has spoken to other officials with proximity to Trump, including his former chief of staff, Reince Priebus Reinhold (Reince) Richard PriebusLeaked audio shows Trump touted low Black voter turnout in 2016: report Meadows joins White House facing reelection challenges Trump names Mark Meadows as new chief of staff MORE, former senior adviser Stephen Bannon, and former press secretary Sean Spicer Sean Michael SpicerKellyanne Conway to leave White House at end of month Pro-Trump duo Diamond and Silk launch new program on Newsmax TV The Hill's 12:30 Report - Presented by Facebook - Supreme Court's unanimous decision on the Electoral College MORE, the Post reported.

Trump's lawyers are reportedly unsure of what information McGahn shared with Mueller over his months of interviews, which began in November, according to the Times.

The president frequently derides Mueller's probe as a "witch hunt," insisting there was "no collusion."

“Disgraced and discredited Bob Mueller and his whole group of Angry Democrat Thugs spent over 30 hours with the White House Councel, only with my approval, for purposes of transparency,” Trump tweeted Monday. “Anybody needing that much time when they know there is no Russian Collusion is just someone looking for trouble.”

Mueller's investigation so far has resulted in indictments or guilty pleas for 32 people and three Russian companies.