President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE told reporters Friday he would be open to sitting down with special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE under specific circumstances, but is wary of landing in a perjury trap.

“I’d do it, but under certain circumstances,” he said on Air Force One.

“It’s a big waste of time. There was no collusion,” Trump added.

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The remark comes as Rudy Giuliani, one of the president’s personal lawyers, walked back comments saying Trump wouldn’t answer questions from Mueller regarding obstruction of justice.

"That is not going happen. There will be no questions at all on obstruction," Giuliani told The Associated Press this week.

However, he later told NBC News those questions are "not ruled in or out" and told Politico, "We're very opposed to that, [but] we're not closing it off 100 percent."

There is an internal debate brewing within Trump’s personal legal team regarding an in-person interview with the special counsel.

While Trump has previously said he’s eager to sit down with Mueller, his lawyers reportedly fear their client would perjure himself.

Giuliani didn’t completely close the door on the possibility of a sit-down interview between Mueller and the president.

"I think we're pretty close to an agreement, maybe this weekend," he said.

"We have said we would agree to written questions on Russia after we review questions but no further commitment on interviews. After we finish this we will assess it with no agreement to any post-presidential questions,” Giuliani told NBC News.

Reports surfaced earlier this week that Mueller has agreed to accept some written answers from Trump regarding the Kremlin’s interference in the 2016 presidential election.

Trump continued his assault on the probe on Air Force One Friday, opting for his favorite refrain of dismissing the investigation as a “witch hunt.”

“It’s such a sad thing for our country to be going through a witch hunt like that. It’s so hard for us to deal with other countries including Russia because of that witch hunt. … It endangers our country. It puts us at a big disadvantage all because of the rigged phony witch hunt," he said.