Trump has called the special counsel probe a "witch hunt" and repeatedly insisted there was no collusion between his campaign and Russian Federation.
Asked, "was President Trump obstructing justice?"
"I've never seen him laugh".
During the interview, Comey repeated his assertion that Trump told him that he expected loyalty and pressured him to drop an investigation into Michael Flynn.
If anything, the Comey book tour is a lesson in 21st century media saturation. Add Donald Trump as an interest to stay up to date on the latest Donald Trump news, video, and analysis from ABC News. "I confess I stared at it pretty closely and my reaction was it must take a lot of time in the morning". "We hope Mr. Trump recognizes this".
Comey said his reaction to the news was disbelief.
In a Sunday-morning tweet, Trump called Comey a "slimeball" while criticizing his handling of the email probe.
And his explosive book, in which Comey compares Trump to the Mafia bosses he once prosecuted, not only represents a new crisis for a reeling White House but also is raising questions about the former director's credibility as a critical witness against the president. It was, without a doubt, one of the most anticipated interviews of the year.
House Judiciary Chairman Bob Goodlatte, a Virginia Republican, said on Fox News Channel on Sunday that Comey was "out for reveng" against Trump.
Comey's televised remarks, coupled with the release of his forthcoming book, offer his version of events surrounding his firing and the investigations into Russian election meddling and Hillary Clinton's email practices.
His ongoing queasiness with the situation he found himself in remains evident, "Speaking is really bad; concealing is catastrophic. My loyalty's supposed to be to the American people and to the institution", Comey said in the interview.
Comey wrote in "A Higher Loyalty" that he assumed Clinton would win - as virtually every major poll suggested - and that he didn't want to tarnish Clinton's presidency as illegitimate if it were to be learned later that the Federal Bureau of Investigation had withheld the information. "'We hold these truths to be self-evident, ' right?" Trump had denied asking Comey to stop investigating Flynn.
"If he called you today saying he meant to quit, what would you tell him?"
"The president is not a king but a citizen, deserving of the presumption of innocence and other protections, yet also vulnerable to lawful scrutiny", the editorial said.
He explained: 'I think impeaching and removing Donald Trump from office would let the American people off the hook and have something happen indirectly that I believe they're duty bound to do directly. "Values matter. This president does not reflect the values of this country", he said. One of the consequences is that those of his comments getting the most attention may be the least important. This President is not able to do that. "He is morally incapacitated to be president".
Encounters with the president, Comey wrote, gave him "flashbacks to my earlier career as a prosecutor against the mob".
Trump did not explain the "many crimes" he alleges that Comey and McCabe committed and there is no evidence that they have done any wrongdoing.