On Sunday night, Trump's lawyer, Rudy Giuliani, argued in an interview with HuffPost that Trump can't be subpoenaed or indicted while he's in office - even if he were to have shot his former Federal Bureau of Investigation director.
On Monday, Trump went on to attack Mueller's investigation, claiming it isn't legal but he doesn't plan to end it.
Trump also tweeted about the special counsel investigation, saying that it was "unconstitutional".
Trump's claim that he could pardon himself - something that he said was backed up by "numerous scholars" - actually is contradicted by others.
"If he shot James Comey, he'd be impeached the next day", Giuliani said to HuffPost.
Trump announces pardon of Dinesh D'Souza
Traditionally, pardon petitions are vetted by the pardon attorney before they land on the president's desk. The career prosecutors and agents did their job. "Issuing pardons used to be a more common practice".
President Trump sought to settle the widespread weekend chatter over whether he'd consider pardoning himself if charged in the Russian Federation probe - tweeting Monday that he has the "absolute right" to do so, but wouldn't have to since he's "done nothing wrong".
Giuliani wasn't the only Republican against the idea of Trump issuing a self-pardon.
Giuliani said Sunday that a decision about an interview would not be made until after Mr. Trump's summit with North Korean leader Kim Jong Un on June 12 in Singapore, and he cast doubt that it would occur at all.
US President Donald Trump signs a document reinstating sanctions against Iran after announcing the US withdrawal from the Iran Nuclear deal.
Asked if Trump has decided whether he will voluntarily be interviewed by Mueller, Giuliani said the answer is most likely no.
The President then called Robert Mueller's investigation "UNCONSTITUTIONAL" but said he would "play the game" because he has "done nothing wrong". "The president never said he pardoned himself", he said on CNN's State of the Union.
Still, a minority of constitutional lawyers believe the U.S. presidency does have powers to protect itself, including shutting down investigations and rejecting subpoenas.
Shortly after, the White House echoed that sentiment with an email to reporters titled: "President Donald J. Trump's 500 Days of American Greatness". President Bill Clinton was charged with obstruction in 1998 by the House of Representatives as part of his impeachment trial.