On Sunday, Trump unloaded a series of nasty tweets about Comey, and called him "slippery", and a "slime ball" and predicted that he would be remembered "as the Worst FBI Director in history, by far!"
Comey's book will be released next week.
Several of the episodes he describes in detail, including a private conversation about former White House national security adviser Michael Flynn, are central to special counsel Robert Mueller's Russian Federation investigation and his recollections are presumably valuable for prosecutors examining whether the president's actions constitute obstruction of justice. "I just thought it was a weird enough experience for me to be talking to the incoming president of the United States about prostitutes in a hotel in Moscow".
He calls Trump "untethered to the truth" is "ego-driven" and runs the White House like a "mob boss".
"I don't think he's medically unfit to be president". I'm not trying to, by the way, suggest that President Trump is out breaking legs and-you know, shaking down shopkeepers. That's not a perspective, that's not a view, that's just a lie.
"It would depend and- and I'm just a witness in this case, not the investigator or prosecutor, it would depend upon other things that reflected on his intent", Comey tells Stephanopoulos.More news: Woolworths hit with technical outage, checkouts unable to process sales
"I'm sorry that I caused all kinds of confusion and pain with the way I described her conduct that led people into all kinds of side roads", Comey said.
Comey answered "possibly" when asked in an ABC News interview whether the president was attempting to obstruct justice when he asked Comey to end an FBI investigation into former White House national security adviser Michael Flynn. Trump wrote in another Twitter post, blasting Comey's comments on Trump's presidency being all about "personal loyalty". Following Attorney General Lorotta Lynch's statement that she would follow the FBI's recommendation in the Clinton email probe, Page wrote, "it's a real profile in couragw [sic], since she knows no charges will be brought" against Clinton. After Clinton's loss, many Democrats blamed Comey, and Clinton herself has said it hurt her election prospects.
Comey's decision to announce an FBI investigation into 2016 Democratic presidential nominee Hillary Clinton's email server use during her time as secretary of state, and his "concern", at the time, that if he had concealed the FBI's investigation, it could have made her an "illegitimate president". "'Cause I was operating in a world where Hillary Clinton was going to beat Donald Trump".
Comey responded: "Yes. But not in the way I often hear people talk about it".
Comey said Trump was most fixated on the allegations about the prostitutes and said that Trump later asked him if he could investigate those claims.
Some of the early news coverage of Comey's memoir has made a mockery of Trump, including the cover of Friday's Daily News in NY.
He later said, though, that he did not believe Rosenstein would fire Special Counsel Robert Mueller if ordered by Trump to do so, and that Rosenstein "has an opportunity in overseeing Bob Mueller to restore some of his professional reputation".