The President interrupted the reporter with “no, no, next question” when asked whether he had tried to stop the FBI’s investigation into Russia’s alleged involvement in the presidential election last year.
Reports have emerged that Mr Comey wrote a memo after a meeting with Mr Trump, where the US President was quoted as saying “I hope you can let this go”.
The memo is said to have been written by Mr Comey the day after Mr Flynn resigned.
Donald Trump shut down a reporter's question on ex-FBI director Comey during a press conference
After shutting the reporter’s question down, the billionaire continued: “Director Comey was very unpopular with most people and I actually thought that when I made that decision.
“And I also got a vey, very strong recommendation from the deputy attorney general Rod Rosenstein but when I made that decision I actually thought it would be a bipartisan decision because when you look at all the people on the Democratic side, not only the Republican side, that were saying such terrible things about director Comey.
"Then he had the very poor performance on Wednesday, that was a poor, poor performance, so poor in fact that I believe, and you would have to ask him…the deputy attorney general went out and wrote his very, very strong letter.
The reporter asked President Trump whether he thought he had urged Mr Comey to drop the probe
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No, no, next question
“And then on top of that, after the Wednesday performance by director Comey you had a person come who had to re-adjust the record which many people have never seen before because there were misstatements made.”
He added: “I thought that was something that was terrible.
“We need a great director of the FBI, I cherish the FBI, it’s special.”
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President Trump claimed Mr Comey had a poor, poor performance on Wednesday
The President added that he will be announcing a new director “very soon”.
Following Mr Comey’s sacking last week, the Justice Department has appointed former FBI director, Robert Mueller, as a special prosecutor to head the investigation into alleged Trump-Russia ties.
Mr Trump has repeatedly denied the allegation that Russia helped him win the US presidential election last year.
Acting FBI director Andrew McCabe has also countered the White House’s claims that Mr Comey had lost the support of staff, adding he continues to enjoy “broad support” among the rank-and-file.