In the letter, President Trump's attorneys noted the "unprecedented access and voluntary cooperation in the collection of all documents requested from the White House, the Donald J. Trump For President Inc., and individual witnesses".
Mueller has told Trump's lawyers that he needs to speak with the president to determine whether he meant to obstruct the investigation into possible links between his associates and Russian Federation, the Times reports.
Giuliani says they would contest it if Mueller tried. The New York Times reported Trump told Russian diplomats in the Oval Office that month Comey's dismissal had "taken off" pressure he faced "because of Russia".
The inclusion of pardoning and ending the probe could serve as both a defense that if Trump was indeed obstructing the investigation, he would have ended it long ago.
House Majority Leader Kevin McCarthy, a Republican, made clear he did not think Trump or any other president should pardon himself.
While at Camp David, Trump tweeted "there was No Collusion with Russian Federation..." asking, "Is the Special Counsel / Justice Department leaking my lawyers letters to the Fake News Media?"
"Indeed, the President not only has unfettered statutory and Constitutional authority to terminate the FBI Director", the letter reads, "he also has Constitutional authority to direct the Justice Department to open or close an investigation, and, of course, the power to pardon any person before, during, or after an investigation and/or conviction".
Trump's lawyers sent the letter as part of a broader argument that the President should not have to sit down with the special counsel.
A court battle is likely if Trump's team argues that the president can't be forced to answer questions or be charged with obstruction of justice.
Shortly before The New York Times published its story, however, Mr. Trump accused Mueller's team or Justice Department officials of leaking information to the media.
Utah GOP Sen. Mike Lee says he's not going to defend Giuliani "because those aren't words that I would use".
More than a dozen members of the special counsel's team have donated nearly exclusively to Democratic candidates, according to Federal Election Commission records; Kevin Corke reports.
"The appointment of the Special Counsel is totally UNCONSTITUTIONAL!"
May 20, 2018 - Giuliani tells CNN that according to a timeline the special counsel's office shared with him about a month before, Mueller is aiming to wrap up his investigation by September 1.
If Trump does not consent to an interview, Mueller will have to decide whether to forge forward with a historic grand jury subpoena.
April 30, 2018 - The New York Times reports on at least four dozen questions that Mueller's team wants to ask Trump. Mr. Trump's legal team did not immediately respond to a request for comment. Dowd left the legal team in March, while Sekulow continues representing the President.
Additionally they spelled out intimately why the firing of James Comey, the Federal Bureau of Investigation director, and different key moments being scrutinised don't quantity to obstruction of justice.