Trump's team has used this admission to try and color Comey and suggest he's an unreliable witness, even though he testified under oath.
'I mean, I want everyone to be thinking about this,' Trump's lawyer said on Stephanopoulos' program. 'So this was an unprecedented move,' he said of Comey's decision to leak the memos into the press.
Sekulow's questioning of coziness between Comey and Mueller prompted Stephanopoulos to ask if the president and his legal team 'don't have confidence in Robert Mueller to conduct a fair investigation?'
Sekulow pivoted.
'No, what we're saying is look, I mean Marc Kasowitz is the lead lawyer in this case and is in charge of the legal team, has said clearly that he is putting forward a legal team and a legal defense that will address all of the issues.
'But I think that the unusual situation here, this is unprecedented in our history, is that the former executive – the former FBI director was the source of a leak,' Sekulow continued.
'I mean, George, you know, we've all been concerned about leaks and here he was the source of that leak,' he added.
President Trump accused Comey of lying, though his lawyer said it would be up to Special Counsel Mueller to pursue perjury charges.
'I think that James Comey's credibility has been brought into question on multiple occasions during the Clinton investigation and here,' Sekulow said, reminding viewers that Comey has had to go back and change his testimony in the past.
Stephanopoulos pointed out that Trump could stop the he-said, he-said, by simply releasing the tapes.
Trump tweeted about the existence of recordings of his conversations with Comey, but the White House hasn't given a real answer on whether or not they exist.
'The president said he is going to address the issue of the tapes, whether the tapes exist or not, next week,' the attorney explained Sunday. 'That's a decision that the president will make in consultation with his chief lawyer Marc Kasowitz, and that the president said he'll address it next week.'
Stephanopoulos also wanted to know if Trump would testify under oath to Mueller.
'Well, the president made that very clear. He has made the statement of what he would do as far as testimony if that's necessary,' Sekulow said.