But Mr Trump's dismissal of the very man in charge of investigating whether his campaign colluded with Russian Federation has attracted allegations of a cover-up.
The president showed no concern that the request might be viewed as meddling in the active FBI investigation into his campaign's possible ties to Russian interference in last year's presidential election.
"James Comey better hope that there are no "tapes" of our conversations before he starts leaking to the press!"
He later tweeted that no one should expect his White House to give completely accurate information.
Cox was brought in after Attorney General Elliot Richardson -ignoring the separation of powers-made a deal with Congress to diminish the president's authority.
But, uh, Donald? "Maybe the best thing to do would be to cancel all future "press briefings" and hand out written responses for the sake of accuracy???"
Trump did not say whether he asked Comey for his loyalty.
Trump's bareknuckle comments immediately fueled fresh comparisons between his administration and that of disgraced president Richard Nixon, who famously recorded his conversations - a fact that sped his downfall during the Watergate scandal. Those assurances came, according to Trump, on three separate occasions: over dinner at the White House when Comey told him he wanted to stay on as the agency director, during a phone call that Trump placed, and another time in a call from Comey to Trump.
In an extraordinarily personal and scathing assessment of the man he has just fired , the president described Mr Comey as a "showboat" and a "grandstander" who had left the Federal Bureau of Investigation in turmoil.
"We finally agree on something Rosie", he wrote on Twitter, attaching a tweet of hers that simply said: "FIRE COMEY".
Instead, Mr. Comey has recounted to others, he told Mr. Trump that he would always be honest with him, but that he was not "reliable" in the conventional political sense.
"I actually asked him, yes. I expect that." Trump also insisted that he didn't collude with Russian Federation, and that he wants the new director to do an investigation to prove that.
"This is why I'm confused", Alexander said to Waters. I'm not talking about anything else.
Meanwhile, acting FBI Director McCabe told the Senate Intelligence Committee Thursday, "You can not stop the men and women of the FBI from doing the right thing, protecting the American people and upholding the Constitution", when asked about pressure from the White House to shape the investigation.
Comey says the FBI will recommend to the justice department that no prosecution is warranted after a year-long investigation into Hillary Clinton's use of a private email server during her time as secretary of state.
"For many people, including myself, it is hard to avoid the conclusion that the president's decision to remove Director Comey was related to this investigation".
May 9, 2017 - In a shocking move, Trump fires Comey.
USA presidents are normally at pains to avoid any suggestion of interference or even commenting on ongoing investigations.