While Trump's abrupt firing of FBI Director James Comey roiled Washington, Republicans who attended the national committee's spring meeting outside San Diego this week defended the president's actions and insisted that they would have little political impact on midterm elections next year.
Clapper's remarks come after Trump tweeted that Clapper had said there is no collusion between Trump's 2016 election campaign and Russian Federation.
"James Comey better hope that there are no "tapes" of our conversations before he starts leaking to the press!"
Mr Trump said he and Mr Comey "had a very nice dinner, and at that time he told me, 'You are not under investigation, ' which I knew anyway".
Clapper also said he talked to Comey after Trump invited him to dinner shortly after he took office, saying Comey "was uneasy with it".
It's unclear what Trump meant when he tweeted about "tapes" on Friday morning.
Trump released his own statement about Comey's firing: "You are hereby terminated and removed from office, effective immediately", Trump wrote to Comey in a letter released by the White House.
"I think it's a good idea", he continued.
Republicans said the issues that Trump campaigned on - repealing the Affordable Care Act, cutting taxes and boosting border security - would determine if the party keeps control of both houses of Congress. Trump said, in a morning Twitter tirade that painted a picture of a president under siege and lashing out.
As CNN reported Friday evening, people familiar with Rosenstein's thinking say he doesn't see a need at this point for a special prosecutor. "I think what needs to happen here is to clear this cloud, a cloud that's hanging over the administration, over the President, over the White House".
The Senate Intelligence Committee invited Comey himself to testify Tuesday behind closed doors.
Trump drew laughs when he said he was "undoing the disgusting damage" done by former President Barack Obama. Laura Ingraham tweeted that the reporting was "false", while Hugh Hewitt said Comey's successor was what mattered.
Trump also said that at the dinner, he and Comey discussed whether the United States top cop would continue his 10-year term.
Trump anxious about recorded conversations - and recording his own conversations - well before he got into politics, according to former Trump Organization executives.
Trump also hit back on Friday at media reports questioning the credibility of White House accounts of why Comey was sacked, which have changed over the course of the week, and threatened an end to regular White House press briefings.
Democratic lawmakers - including New Jersey Sen.
On Thursday, about 300 protesters marched on the beach, chanting, "Hey, hey, ho, ho, Donald Trump has got to go!"
As a result, Krishnamoorthi requests that McGahn "confirm the existence of "tapes" and/or a taping system in the White House", along with details as to how long it has been in place, the individual who ordered its installation, and the status of the recordings that it captures.
He stuck to that response several times as reporters circled back to the question of whether Trump is using recording devices in the White House. Acting FBI Director Andrew McCabe, Republican Senator John Cornyn, New York Appeals Court Judge Michael Garcia and former Assistant Attorney General Alice Fisher will be interviewed on Saturday for the post, an administration official said.