Trump have denied any wrongdoing.
The president took to Twitter early Friday to tell Comey to think twice, in case he's mulling whether to publicly contradict Trump's assertion that the now-former FBI director three times assured Trump he was not under investigation.
During the interview, Trump said there's an "incredible" level of hostility from reporters toward Press Secretary Sean Spicer and his deputy, Sarah Huckabee Sanders.
President Donald Trump seemed to throw him a brushback pitch on Twitter, writing Friday that Comey had 'better hope that there are no "tapes" of our conversations before he starts leaking to the press!'
Ample reasons existed to worry about this president, and to ponder the extraordinary remedy of impeachment, even before he fired FBI director James Comey and shockingly admitted on national television that the action was provoked by the FBI's intensifying investigation into his campaign's ties with Russian Federation.More news: Penalty pain for Hull as relegated Tigers set Premier League record
Now, Mr Trump appears concerned about what Mr Comey might say about his removal.
Clapper tells MSNBC on Friday that he spoke briefly with Comey about the dinner before they attended a retirement celebration for Clapper. Mr. Spicer also said the tweets were "not a threat". Mr Comey declined to do so, saying he would always be honest with the president but wasn't "reliable" in a political sense.
In a series of tweets on Friday, Trump also responded to media reports questioning the credibility of White House statements on the Comey firing, which have changed over the course of the week.
QUESTION: Is the president considering canceling the daily press briefings?
Apparently angered by criticism of the different accounts of the sacking, Mr Trump used another of his tweets on Friday to say: "As a very active President with lots of things happening, it is not possible for my surrogates to stand at podium with ideal accuracy!"
'Under normal circumstances, we would not consider credible any claims that the White House may have taped conversations of meetings with the President, ' they wrote. At the same time, the percentage who view Trump as too friendly with the Russian leader has risen from 31 percent to 38 percent.More news: Trump tweets warning to Comey over leaks
Mr Trump has refused to release his income tax records, despite pressure from Democrats, breaking with a practice set by his predecessors.
But the decision to fire Comey has again elevated the congressional and intelligence community's investigations into Russia's influence in the 2016 election.
Several people close to the president say his reliance on a small cadre of advisers as he mulled firing Comey reflects his broader distrust of many of his own staffers. He said in an interview on Thursday with NBC News that Comey gave him this assurance during a dinner and in two phone conversations.
"No I don't, I know that some are obsessed with the word Russia - the president is not under investigation, I'm around the president, I'm not under investigation", Conway said.
But here's the only thing that we should be talking about: What is the process for removing Donald Trump from the nation's highest office? "I can name many people in that same situation".
The White House said Trump is weighing options for replacing Comey, a decision that could have broad implications for the future of the Russian Federation investigation.More news: Fox orders Marvel drama The Gifted to series