The New York Times was the first to report the discussion and subsequent memo Tuesday. The White House issued a furious denial near the end of a tumultuous day spent beating back potentially disastrous news reports from dawn to dusk. The newspaper cited a memo Comey wrote shortly after the conversation. "He is a good guy".
A memo of that sort would be consistent with a practice Comey is known to have established earlier in his career of writing memos to document incidents that he found noteworthy or disturbing.
After Tuesday's revelation, the White House said in a statement, "While the President has repeatedly expressed his view that General Flynn is a decent man who served and protected our country, the President has never asked Mr. Comey or anyone else to end any investigation, including any investigation involving General Flynn".
'The President has the utmost respect for our law enforcement agencies, and all investigations. Acting FBI Director Andrew McCabe told Congress last week the investigation is "highly significant" and said Comey's dismissal would do nothing to impede the probe.
When that ended, Trump asked everyone to leave except Comey, and he eventually turned the conversation to Flynn.
The official questioned why - if Comey had concerns about his conversations with the president - the Federal Bureau of Investigation director hadn't shared them with the deputy director, the Department of Justice and Congress at the time.
Comey created similar memos, including some that are classified, about every phone call and meeting he had with the president, the two people said.
The meeting in question took place February 14, the day after Trump fired Flynn because he had misled colleagues - including Vice President Pence - about the substance of phone calls he had with the Russian ambassador to the United States, Sergey Kislyak.
After expressing frustration with media leaks, Trump pivoted to the Flynn investigation.
China pledges $124 billion for new Silk Road, says open to everyone
Putin, speaking at the opening of the event, told participants that protectionism is a threat to the global economy. He said the two-day forum would be an exchange of views on how to improve connectivity that would benefit all.
An FBI spokesperson declined to comment on the existence of any contemporaneous memo written by Comey following his February 14 meeting in the Oval Office.
Comey, appointed director in 2013 by former President Barack Obama, replied to Trump's "good guy" remark by saying, "I agree he is a good guy", according to the paper.
The White House has grown suspicious about the volume and timing of the seemingly never-ending stream of leaks about the president, said one senior administration official who spoke on condition of anonymity to reflect on the feeling inside the West Wing.
October 28, 2016: Days before the election, Comey informs Congress by letter that he is reopening the investigation into Clinton's email practices based on new evidence, citing the discovery of emails on a laptop used by a top Clinton aide.
And while Comey himself has been silent, his associates have been exposing intriguing details of his encounters with Trump.
Soon after the firing, a Comey associate told the AP that Comey recounted being asked by Trump at a January dinner if he would pledge his loyalty.
The FBI has been reviewing Flynn's contacts with Kislyak prior to Trump's inauguration, in which he discussed sanctions the Obama administration imposed on Russian Federation.
House Oversight Committee Chairman Jason Chaffetz, R-Utah, sent a letter Tuesday evening to McCabe requesting all "memoranda, notes, summaries, and recordings referring or relating" to communications between Comey and Trump.
Schumer has been urging Deputy Attorney General Rod Rosenstein to name a special counsel to investigate Russian interference into last year's campaign and ties between Russian and Trump associates, including Flynn.