Comey gave ammunition to the president's side, too, particularly by admitting that he had orchestrated the leak of his account of his most critical meeting with Trump with the express objective of spurring the appointment of a special counsel, which he accomplished.
President Donald Trump welcomes Romania's President Klaus Werner Iohannis to the White House in Washington, Friday, June 9, 2017.
Later that day, Trump doubled down on his accusation during a press conference from the White House Rose Garden, The Hill reports.
"I believe the James Comey leaks will be far more prevalent than anyone ever thought possible". Asked if Mr Trump ever demanded the Russian Federation investigation be shut down, he said flatly: "No".
Comey testified at a Senate hearing that he made memos after speaking to Trump on several occasions because he feared the president would lie about them.
But he said that Mr Trump's request at a Feb 14 meeting for him to ease the probe of former national security adviser Michael Flynn sounded like an order.
Trump continued to be coy about the possibility of there being recordings of his conversations with Comey, which he has suggested previously.
Collins, a member of the Senate intelligence committee, which is investigating Russia's interference in the 2016 election, said Comey's motivation "may have been a good one".
"I didn't say that", Trump insisted Friday, before heading to his New Jersey golf club in Bedminster where he will spend the weekend.
Under oath on Thursday, Comey told the Senate Intelligence Committee that he consciously decided to make the memo detailing Trump's request unclassified.
"You're going to be very disappointed when you hear the answer, don't worry", Trump said seconds after insisting he was "not hinting at anything".
Trump abruptly fired Comey as director of the Federal Bureau of Investigation on May 9, later admitting that the Russian Federation probe was on his mind at the time.
"The administration then chose to defame me and more importantly the Federal Bureau of Investigation by saying that the organisation was in disarray, that it was poorly led, that the work force had lost confidence in its leader", Mr Comey said.
Two officials familiar with Trump's legal strategy said his lawyers plan to file a complaint about Comey's leak with the Inspector General's office at the Department of Justice, and with the Senate Judiciary and Intelligence committees. But, she said, he was wrong to leak his notes to the public and should have given that document to her panel.
The disclosures that followed Comey's firing have raised questions about why Comey, known in government for an independent streak and a willingness to buck protocol, did not speak out publicly while on the job, or at least make his objections directly known to the president.