Mr. Trump invited the F.B.I. director at the time, James B. Comey, to dinner in January 2017, one day after the acting attorney general, Sally Yates, came to the White House to discuss her concern that the national security adviser, Michael T. Flynn, had not been telling the truth about his contacts with the Russian ambassador to the United States.
The invitation appears to have alarmed a number of Mr. Trump’s advisers, according to the report. Mr. McGahn had earlier advised the president not to communicate directly with the Justice Department. When Mr. Bannon, a senior adviser at the time, heard about the invitation, he suggested that he or Mr. Priebus attend as well.
The president declined the offer and said he wanted the time alone with Mr. Comey. According to the report, Mr. Priebus told him, “Don’t talk about Russia, whatever you do.”
The president said he would not discuss Russia. Instead, he brought up Mr. Flynn, saying that “the guy has serious judgment issues.” He also demanded loyalty from Mr. Comey.
After that exchange became public, Mr. Trump and his aides disputed Mr. Comey’s version of events, going so far as to say that Mr. Comey, not the president, had requested the meeting.
But the report said “substantial evidence corroborates Comey’s account of the dinner.” That evidence includes the president’s daily diary, which notes that he extended the invitation, as well as the recollection of senior F.B.I. officials whom Mr. Comey told about the conversation afterward.
As the disclosure of his demand for a loyalty pledge spurred controversy, the president did not seem to understand the fuss. During a private conversation with the White House press secretary at the time, Sean Spicer, Mr. Trump denied ever making the demand, the report said.
And even if he did, the president told Mr. Spicer, “Who cares?”