The demands, if not met, could lead to turbulence when Trump eventually names a nominee to replace Comey.
"What I can tell you is the president, when given these recommendations, made a decision to accept their conclusions and to remove director Comey and begin that restoration of confidence and leadership that needs to happen there", Spicer said.
"I think in many ways our institutions are under assault", Clapper said, as the interview continued.
SPICER: So, I - look, I think we come out here every day and try to do the best job we can communicating what the president's done and the accomplishments he's making on the American people.
That's why Trump's tweet gave pundits and historians fresh ammunition to continue drawing comparisons between Trump and Nixon as they have in the days since Trump fired Comey, who as head of the FBI oversaw the investigation into potential coordination between Trump campaign associates and Russian Federation during the 2016 election.
Rosenstein, on the job for just more than two weeks after a 94-6 Senate confirmation vote, has drawn criticism because the White House initially pinned the firing of Comey on Rosenstein, saying he had penned a memo expressing concern about the way Comey had handled the Hillary Clinton email investigation.
Almost two-thirds (63 percent) of Republicans still believe the White House's first rationale for Comey's firing - that the FBI director was dismissed for poorly handling the investigation into Hillary Clinton emails - according to a recent public poll from NBC and the Wall Street Journal.
In a weekend interview with Fox News's Jeanine Pirro, the president also declined to elaborate.
Asked whether Spicer would be the White House press secretary "tomorrow", however, Trump demurred, replying simply, "Well, he's been there from the beginning".
Rosenstein has told officials he was unhappy with the manner in which the Comey firing took place.
Moors murderer Ian Brady dies aged 79
The murderer, who was 79 when he passed away, was confirmed to have died in prison by Mersey Care NHS Foundation Trust. Eventually caught and jailed for life in 1966, Brady refused to tell the Bennett family where their son was buried.
One thing has changed however: Overall, 78 percent of surveyed Americans said they prefer a special prosecutor or independent investigation into the possible ties between Trump's campaign and Russian Federation, including 68 percent of Republican voters.
"If there are any tapes of this conversation, they need to be turned over", Senator Lindsey O. Graham, R-S.C., said on NBC's "Meet the Press".
The furore over Comey's firing has put McCabe, the acting director, in a delicate position.
QUESTION: Is the president considering canceling the daily press briefings?
His latest attack on the media came after his administration's shifting narrative on the firing of James Comey as Federal Bureau of Investigation chief was questioned by the media.
In a statement, Durbin said that what he characterised as Trump's admission that he fired Comey because of the Russian Federation probe was "dangerously close to obstruction of justice".
Others on the list include white-collar defence lawyer Alice Fisher and NY state judge Michael Garcia, according to the Washington Post.
Senate Democratic Leader Chuck Schumer said Trump must immediately provide Congress with any tapes and warned that destroying existing tapes would violate the law.
The White House has not explained further.
"To date, there has been no evidence of collusion", Burr said in a statement.