Trump's accusation that the probe could have an impact on the fall elections comes as his lawyers and Mueller's team continue a lengthy back-and-forth over whether Trump will sit down for an interview with the special counsel's team.
Mueller, who is investigating allegations of Russian meddling in the 2016 USA election, learned of the incident in subsequent months as his investigators interviewed current and former senior White House officials in an inquiry into whether the president obstructed justice. "And his client is not Donald Trump; his client is the office of the president". "But I allowed him and all others to testify - I didn't have to".
"Disgraced and discredited Bob Mueller and his whole group of Angry Democrat Thugs spent over 30 hours with the White House Councel [sic], only with my approval, for purposes of transparency", Trump tweeted early Monday morning.
The Times, however, said McGahn was in part motivated by fear of becoming a scapegoat if wrongdoing was discovered.
The newspaper also reported that, according to a person with knowledge of the President's thinking, Trump incorrectly thought that McGahn would act as a personal attorney would and exclusively defend the President's interests in interactions with the special counsel team.
The top lawyer in the White House is "co-operating extensively" with the Russian Federation inquiry into election meddling, the New York Times reports.
Trump also curiously misspelled "counsel", which he did on Sunday as well. Trump's attorneys, including Rudy Giuliani, assumed McGahn would do Trump no damage. The Times and CNN are reporting McGahn may be leaving the president in the dark on what he and Mueller talked about.
"I can't imagine that McGahn would still be White House counsel if he had produced any damaging information", said Mark Corallo, a former spokesman for the president's legal team.
A source close to the President told Reuters on Saturday that the extent of Mr. McGahn's cooperation was "a tactical or strategic mistake" instigated by Mr. Trump's first legal team and it should not have been allowed to happen because Mr. McGahn should have been covered by executive privilege. Trump has repeatedly denounced the investigation into whether his campaign colluded with Moscow as a "witch hunt".
"It's somebody's version of the truth, not the truth", he said, telling NBC: "Truth isn't truth". Also, Nixon knew I was meeting with prosecutors, b/c I told him.
McGahn reportedly has told investigators what he knew about the president's role in the firing of former FBI director James Comey, Trump's repeated criticism of Attorney General Jeff Sessions and his role in the Russian Federation investigation before the president hired outside counsel to deal with the matter, The Times reported, citing a dozen anonymous sources.
"People always view cooperation as giving up incriminating information but you can cooperate, tell the truth and not give up incriminating information because there's none to give up", Giuliani said.