It also followed the Justice Department's move on Thursday to give to House committees the memos Comey wrote documenting private conversations he had with Trump before being fired in May 2017. Among the revelations is that Trump expressed concerns about Flynn's judgment weeks before he was forced to resign.
Mr Comey has painted Mr Trump as "morally unfit" to be U.S. president, and suggested he may have obstructed justice by trying to pressure him into dropping any investigation into Mr Flynn. "Is that really the way life in America is supposed to work?"
The emails echo similar comments made in James Comey's new tell-all book, where the former FBI chief claims Obama "jeopardized" the Hillary probe by making comments that caused many to question the administration's role in the investigation. Trump wrote at shortly after midnight.
The president asked "whether the FBI leaks, " and Comey responded that the bureau "leaks far less than people say".
Flynn was later fired for lying to vice president Mike Pence-18 days after the White House learned he was vulnerable to blackmail by the Russians.
After he was sacked by Trump, Comey testified before the Senate past year that he provided memos to "a friend" - Columbia Law School professor Daniel Richman - to read to the New York Times in hopes it would prompt the appointment of a special counsel to lead the Russian Federation investigation.
Speaking to Stephen Colbert, Comey said, "He's tweeted at me probably 50 times".
In his memos, Mr Comey writes that he was asked by Mr Trump to drop an inquiry into links between Mr Flynn and Russian Federation.
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Yet Trump and Comey were clearly on the same page about leaks, even if they weren't quite in agreement on whom to hold accountable for them. Comey assured Trump that McCabe is as honest as the day is long-like everyone else at the FBI!-and totally above politics.
"The president said "this hookers thing" is nonsense", Mr Comey wrote. Expressing frustration over the leaks, in one of the memos Trump is suggesting jailing reporters to find out what they know. Priebus asked Comey, according to the memos, referring to an order under the Foreign Intelligence Surveillance Act.
Trump has disputed Comey's accounts of their conversations.
"I said to him, 'Sir that's up to you but you want to be careful about that because it might create a narrative that we're investigating you personally and, second, it's very hard to prove something didn't happen, '" Comey said.
Attorney Michael Bromwich on Friday addressed an inspector general investigation that led to McCabe's firing last month on allegations that he had misled officials about a news media disclosure.
"In fact, when I made a decision to just do it, I said to myself, you know, this thing with Trump and Russian Federation is a made-up story, an excuse by the Democrats for having lost an election". McCabe is now facing a criminal referral over unauthorized leaks to the media and allegedly lying about it.
A individual familiarized with the matter told the newspaper that Justice Department Inspector General Michael Horowitz is now spearheading an analysis.