Giuliani also on Sunday backed Donald Trump Jr, who had arranged a meeting at Trump Tower in Manhattan with Russian lawyer Natalia Veselnitskaya, who has connections to the Kremlin, soon after clinching the Republican presidential nomination in 2016. "No matter what it is", he said.
Mueller's investigation originally focused on allegations of collusion between the Trump campaign and Russian Federation, but over the past 12 months, the scope expanded to include unrelated charges against Trump campaign associates.
Giuliani, appearing on ABC's "This Week" Sunday morning, said Trump could pardon himself, though has no plans to do so. Could the president stop an investigation of himself, if not directly then by firing as many Justice Department officials as it takes until he finds one who will do it for him?
"He has no intention of pardoning himself, but...it doesn't say he can't!".
Numerous legal issues the president's team raised have little precedent, legal analysts said.
Giuliani agreed with the letter's finding that Trump has unlimited power to pardon while saying, in a separate appearance on NBC's "Meet the Press", that pardoning himself would probably lead to impeachment. But, Giuliani added: " I'm a lawyer ... "Other presidents have pardoned people in circumstances like this, both in their administration and sometimes the next president, even of a different party, will come along and pardon".
Rudy Giuliani, the former New York City mayor who became Trump's lead lawyer in April, said the two sides would go to court if Special Counsel Robert Mueller attempts to subpoena the President.
Donald Trump's lawyer has claimed the U.S. president "probably" has the power to pardon himself from special counsel Robert Mueller's investigation into Russian interference in the 2016 election.
"He could, if he wished, terminate the inquiry, or even exercise his power to pardon if he so desired."
"In no case can he be subpoenaed or indicted", Rudy Giuliani told HuffPost Sunday, claiming a president's constitutional powers are that broad.
"The bottom line is that there is no valid answer to the question, 'Can Trump pardon himself?' other than, 'He could try,"' Kalt told The Post.
Giuliani said he doubted Trump would now grant Mueller an interview.
Or, I'll tell you what, you want a short little three, four month investigation?
"I could stand in the middle of Fifth Avenue and shoot somebody and I wouldn't lose voters", Trump said at the time.
The lawyers emphasize that Trump had already gone beyond what is legally required of him and had waived the executive communications privilege in order to exhaustively satisfy Mueller's queries. It sounds like a lot of money, until one puts things in perspective by acknowledging that the federal government is expected to spend $4.1 trillion in the 2018 fiscal year.