The letter came in response to a New York Times report on Saturday that the Trump legal team sent Mueller a 20-page memo in January arguing that Trump was incapable of obstructing justice in the Russian Federation collusion case because he could "if he wished, terminate the inquiry, or even exercise his power to pardon".
Giuliani also raised eyebrows over the weekend when he told HuffPost that he believed the President could not be indicted while in office - going so far as to say that Trump could shoot Comey and not face charges before being impeached.More news: Warriors ready for road test vs confident Cavs in NBA Finals
Trump's lawyer, Rudy Giuliani, made it clear the president has no intention to actually pardon himself, but that the revelation of the power to do so strengthens the argument of Trump's legal team that he didn't obstruct justice.
The dispute among scholars on the issue nearly guarantees that if Trump faced indictment and pardoned himself, the next step would be a court challenge, with the President's fate decided by judges - or even the Supreme Court.
But not everyone at the White House appears to be thrilled with the direction he's taking, as top aides are reportedly "disturbed" by his deliberation process with regard to at least one potential pardon, which was brought to Trump's attention by Kim Kardashian.
Trump has issued two pardons in recent days and discussed others, a move that has been interpreted as a possible signal to allies ensnared in the Russian Federation probe. It was written in January by Trump's then-lawyer John Dowd and another Trump lawyer, Jay Sekulow.More news: Thousands of breast cancer patients could be spared chemotherapy
It comes as the White House and Mueller's team were girding for a possible high-stakes legal showdown over whether Trump will agree to or be forced to be interviewed by investigators, as well as a possible impeachment push that could result from the probe.
"For every one of these things he did, we can write out five reasons why he did it", Giuliani said.
Mr. Trump's legal team has long pushed the special counsel to narrow the scope of its interview. The inconsistency will not faze them, since the willingness to spout nonsense is part of how they show their fealty to Trump. The truth is this country has never been put in a position to have to test such a predicament, and we ought to ask ourselves how we got to this point at all. "Our recollection keeps changing" and sometimes needs to be corrected.
The President on Thursday pardoned conservative commentator and filmmaker Dinesh D'Souza, who pleaded guilty in 2014 to USA campaign finance law violations.More news: Gmail's major redesign will be available to all in July
And while the president's pardon power is "very broad", there are other checks - including the fact that he can be impeached and that he can be voted out of office, Morison pointed out.