Trump addressed Comey's testimony before the Senate Intelligence Committee, calling the former Federal Bureau of Investigation chief a "leaker" and denying that he ever asked Comey for his loyalty during a private meeting between the two men.
After his dismissal, Comey leaked shocking details of a series of meetings with Trump, in which the president allegedly asked for Comey's "loyalty" and suggested that he shelve an FBI investigation into Trump's national security adviser. Pressed on the issue on Friday, Mr Trump said: "I'll tell you about that maybe sometime in the very near future".
Comey had been leading an FBI investigation into several Trump aides and their contacts with the Russian government - which U.S. intelligence agencies say tried to tilt the 2016 election in Trump's favor - before being fired.
Fears exist that with President Trump testifying in public, the senate hearing surrounding Comey's intelligence committee testimony would take the controversial matter to a very high level that could affect the country's image in the short and long term.
He said he refused on all points, told senators of the detailed memos he had written after his conversations with Trump and said he hoped they were taped because he is confident of their veracity.
"I'm not going to speculate on what [Trump] will or will not do" with regard to Robert Mueller, the special counsel leading the FBI's Russian Federation probe, Sekulow told ABC News Chief Anchor George Stephanopoulos in an exclusive interview on "This Week" Sunday.
A Democratic senator says she shares a sense of unease James Comey had when it came to the Obama administration and the need to ensure the FBI's independence.
He declined to speak with a reporter from The Record newspaper.
Leaders of the House Intelligence Committee, which is also investigating suspected Russian election meddling, have written White House counsel Don McGahn asking whether tapes exist and, if so, that they be produced to the committee by June 23. "Yesterday showed no collusion, no obstruction", Trump said.
He said he was "committing the United States to Article 5".
Reed says he also wants to know if Sessions had additional contacts with Russian officials during the presidential campaign that were not previously disclosed.
The president had previewed his attacks against Comey in an early-morning tweet that broke his previous day's silence on his favourite social media megaphone.
"Despite so many false statements and lies, total and complete vindication", Trump wrote. Trump wrote at 6.10am.
The White House has repeatedly tried to shift the focus away from the content of Comey's allegations and onto the manner of their release. He derisively repeated the "leaker" moniker to reporters in the Rose Garden. Attorney General Jeff Sessions is in for sharp questioning on Tuesday by senators on the Senate intelligence committee.
There was one other thing Comey said: "Sometimes when you start turning over rocks", you find things not related to the original criminal investigation.