On Thursday, Giuliani told Politico an agreement over written answers from the president on alleged Russian collusion in the 2016 election could happen this weekend.
"I'd do it under certain circumstances", Trump said. Rudy Giuliani, one of Trump's attorneys, famously said last month that he believes Trump could face perjury charges even if he tells the truth, saying: "Truth isn't truth".
Trump's comments aboard Air Force One came a day after his lawyer, Rudy Giuliani, gave conflicting comments about whether Trump would answer certain questions from Mueller. Trump has also denied any campaign collusion.
"We have said we would agree to written questions on Russian Federation after we review questions but no further commitment on interviews".
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He even barely took any time between points while serving - and he's known as one of the slowest guys on tour. "I still here. Nine years ago, he stunned Nadal in the semifinals, then Roger Federer in the final, to win the US Open at age 20.
Giuliani added that for now, there's "no commitment on obstruction which are post-presidential matters", but said the legal team would agree to talk "after the collusion/pre-presidential questions are over". Trump's legal team has argued that the president has the power to hire and fire appointees and the special counsel does not have the authority to ask him to explain those decisions.
If negotiations break down with Mueller, a subpoena could be issued for Trump to testify before a grand jury, which Giuliani has said they would fight all the way to the US Supreme Court.
The stance leaves open whether Mueller might decide to subpoena Trump for the testimony, which would nearly certainly lead to a legal battle before the Supreme Court.
Trump has said he knew nothing about the meeting before it happened. "We aren't going to let them spring it on us", he said.
Trump and Giuliani have led an onslaught of attacks on Mueller's credibility, claiming that the special counsel was biased and that the entire probe was a "witch hunt".
Trump, in a Fox News interview taped ahead of a Thursday night rally in Montana, was noncommittal when asked about a possible Mueller interview.