White House press secretary Sarah Huckabee Sanders on Monday refused to answer questions about a recently revealed letter from Trump's legal team to Robert Mueller establishing that she lied to the American people.
Trump also tweeted about the special counsel investigation, saying that it was "unconstitutional".
Legal experts said Trump was claiming executive privileges that few presidents had ever claimed before.
But that strategy changed after Trump overhauled his legal team, and in recent weeks the president and his new attorneys have become openly dismissive of Mueller and his team of prosecutors. "That's another really interesting constitutional question: Can the president pardon himself?" he added.
Trump considers pardon for Blagojevich
In his victory lap Thursday, D'Souza mocked Bharara. "The president said 'Dinesh, you've been a great voice for freedom". Trump said on Twitter . "Obama & his stooges tried to extinguish my American dream & destroy my faith in America".
But he continued to cast doubt on the special counsel's eventual findings, suggesting that Mr. Trump has already offered explanations for the matters being investigated and that the special counsel was biased against the president. "I don't know how you can indict while he's in office, no matter what it is", Giuliani told HuffPo.
Trump hasn't been accused of wrongdoing, and highlighted that as he railed against Mueller's investigation.
"Your office clearly lacks the requisite need to personally interview the president", it said.
Doing so, Giuliani said, would "lead to probably an immediate impeachment", adding that he "has no need to do that".
"Certainly the constitution clearly lays out law and once again the president hasn't done anything wrong and we feel very comfortable on that front", she replied.
Tobias said there isn't much of a precedent for heads of state pardoning themselves in the US, but likely wouldn't be covered in their vast powers.
The letter, dated January 29, argues that, as president, Trump cannot be indicted, cannot be subpoenaed and could not be held guilty of obstruction of justice due to his position as the "chief law enforcement officer".
Trump also gushed over his own performance in the first 500 days in the White House in his latest social media outburst.
"This understanding of presidential power is radical and absolutist", he said.