Trump wrote in one of seven tweets published Friday morning.
Spicer said the interview process would start immediately but that Trump had not decided whether Comey's replacement should be political or not.
While the answer to whether such "tapes" are legal largely depends on which state they were recorded in, it seems fairly likely that Trump, if he did, in fact, tape his conversations, broke no laws in recording his discussions with Comey. "Trump only a few weeks ago was praising Comey".
If anyone were to have recorded the conversations between the President and FBI Director James Comey, as Trump has suggested, it would have been the commander-in-chief himself, numerous experts said Friday - but it's probably just a bluff anyway.
Norm Eisen, a White House Ethics Czar for President Barack Obama, noted that Trump's tweet could even be criminal intimidation of a witness to his attempt to obstruct justice. We don't always have the opportunity to get in to see the president, and in those cases, I think we do a pretty good job of following up and getting you that information after the briefing, or in a subsequent - so - so that's - that's - that's exactly what he meant. "The tweet speaks for itself".
White House spokesman Sean Spicer told a news briefing that Trump did not demand Comey's loyalty.
"I think loyalty to the country, loyalty to the United States is important", Trump said.
On Friday, Clapper began pushing back - and added his voice to the chorus of officials and lawmakers from both parties who worry that there's more still to come out about possible collusion between the Trump team and the Kremlin during the campaign. The president has said he would release his returns when the Internal Revenue Service completes an audit.
President Donald Trump is reiterating his view that reports about collusion with the Russian government by members of his 2016 campaign are "fabricated".
Mr Trump's comments provoked fresh comparisons between his administration and that of disgraced President Richard Nixon, who famously recorded conversations, speeding his downfall during the Watergate scandal. However, he noted the meetings were badly timed, given that Trump had just fired the director of the agency investigating his campaign's ties to Russian Federation.
"All I want is for Comey to be honest - and I hope he will be".
Mr Trump has said Mr Comey told him three times he was not a target of the FBI inquiry, fuelling accusations the president was interfering in the investigation.
A source close to Comey told CNN that the president's attempt to threaten the former Federal Bureau of Investigation director had failed, since, "if there is a tape, there's nothing he is anxious about" that could be on it. And Comey never told Trump he was not subject to the Russian Federation investigation.
Clapper's comments have not been as definitive as Trump said. Indeed, the effort of Trump and his White House to make the FBI's Clinton email investigation the basis for firing Comey was ludicrous on its face.
U.S. President Donald Trump's firing of FBI Director James Comey this week was one thing.
US intelligence agencies concluded in January that Russian President Vladimir Putin ordered a campaign of interference in the election aimed at tilting the vote in Trump's favour. Moscow has denied any such meddling.
"As a very active President with lots of things happening, it is not possible for my surrogates to stand at podium with flawless accuracy!"
Trump tweeted Friday that his staff can't be expected to be "perfectly accurate" in the briefing room, and mused about canceling press briefings altogether. And demand the name for the new director (not a Democratic judge, come on) come from Congress rather than the president, who is utterly compromised on this issue?