What if he didn't tell anyone, though?
"Trump has made admissions about that". But why not blow the whistle?
The New York Times reported on Tuesday that Mr Comey wrote a memo following a meeting with the president on 14 February, saying that Mr Trump had asked him to close an investigation into Mr Flynn's actions. That suggests Comey feared agents would be intimidated if they learned that the president wanted the Flynn probe ended and might go soft on Flynn because of it.
Putin told a news conference that he would be willing to turn over notes of Trump's meeting with the Russian diplomats if the White House agreed.
News yesterday of Trump's request of Comey immediately renewed concerns from congressional Democrats that Trump was trying to obstruct an investigation that's been examining potential co-ordination between Russian Federation and the Trump campaign.
The FBI chief was later fired by Mr Trump. He is doubting his top advisers, even son-in-law Jared Kushner, who supported firing FBI Director James Comey despite the ongoing Russian Federation investigation. When that ended, Trump asked everyone to leave except Comey, and he eventually turned the conversation to Flynn. The Times story doesn't claim that Trump threatened him.
But he says, "you can not let them get you down".
Trump's Friday departure comes with his White House rocked nearly daily by damaging revelations that are troubling growing numbers of Republican lawmakers.
"What else will the people generating such drivel and nonsense think of next?" he said. But at the DOJ itself?
One more thing. All of this was playing out against the backdrop of Comey having possibly influenced the outcome of a presidential election just three and a half months before.
For now, congressional Republicans are confident with congressional committees handling the investigation.
Armed Services Chairman John McCain issued a statement calling the reports "deeply disturbing" and said they could impede allies' willingness to share intelligence with the U.S.in future. But the swirling questions about his conduct were clearly on his mind when he told graduates at the U.S. Coast Guard Academy in CT that "no politician in history, and I say this with great surety, has been treated worse or more unfairly". But once he was sacked and Trump went on TV to say that his annoyance with the Russian Federation investigation was part of the calculus, he apparently decided he had to act.
The tumult in Washington deepened overnight, over allegations Trump had sought to end the FBI's investigation into ties between Trump's first national security adviser, Michael Flynn, and Russian Federation.
The associate was not authorised to discuss the memo by name and spoke on condition of anonymity.
The Senate Intelligence Committee sent two letters on Wednesday to former FBI Director James Comey and Acting FBI Director Andrew McCabe requesting their cooperation in the committee's ongoing investigation into Russia's election interference, and whether President Donald Trump's campaign was involved.
More than one-third of Americans (35 percent) support a special prosecutor, a move backed by 44 percent of Democrats and over a quarter of Republicans (27 percent).
In dismissing Comey last week, Trump created the very real possibility that a respected law enforcement official known for an outspoken nature and willingness to buck political convention could resurface in public. In a separate but related probe, the Federal Bureau of Investigation is looking into Flynn's ties with Russian Federation.