Trump, meanwhile, tweeted a slew of insults at Comey, whom he fired in May.
In his Monday morning tweet, Trump also accused Comey of lying to "Senator G".
Conway, during an appearance on ABC's "Good Morning America", appeared to suggest Comey's handling of the Hillary Clinton email probe handed her boss the presidency. When it was announced that Comey would be releasing a new book, all eyes were set on what details and information would be revealed.
Huh. So it seems Conway is criticizing Comey for swinging the election for Trump, something that Conway and Trump benefitted from, I guess? On Sunday, Comey said he felt that sending the letter was the right thing to do.
Sen. Charles Grassley, R-Iowa, asked Comey if he had ever "been an anonymous source in news reports about matters relating to the Trump investigation or the Clinton investigation?" or if he had ever "authorized someone else at the FBI to be an anonymous source in news reports about the Trump investigation or the Clinton investigation?"More news: Reuben Foster will not participate in 49ers team activities
Trump's comments on Twitter were his first since Comey's high-profile television interview Sunday night in which he said he believes Trump is "morally unfit" to be president and that he hopes Trump will be voted out of office.
Hours before the interview was shown, the president, who sacked Mr Comey past year, unleashed a Twitter outburst that labelled him "slippery", suggested he should be put in jail and branded him "the WORST FBI Director in history, by far!"
"I saw James Comey last night and I thought: 'Is it true that James Comey swung an election?"
When Stephanopoulos accurately stated that wasn't true, Conway hopped into Trump defense mode and rattled off claims Comey wanted to siphon power away from the president by being in close contact with him. "As I said dozens of time, Hillary, not Comey, is why Hillary lost", she wrote.