Former New York City Mayor Rudy Giuliani said Thursday that a "50-50" chance existed that Russia special counsel Robert Mueller would subpoena President Donald Trump.

"But I got to prepare for that 50 percent," Giuliani told ABC News in a telephone interview.

Giuliani, 73, a former federal prosecutor, joined Trump's personal team last month with the goal of quickly ending the Mueller investigation "for the good of the country."

According to news reports, Mueller threatened to subpoena President Trump in a contentious March 5 meeting with his lead counsel at the time, John Dowd, who argued the president was not obligated to speak with federal investigators.

Dowd has since left the Trump team — and Emmet Flood, who represented former President Bill Clinton during impeachment proceedings in 1998, joined the group this week, replacing the retiring Ty Cobb.

"I think Emmet was brought in because he represented Clinton during their subpoena battle and knows a great deal about it," Giuliani told ABC Thursday.

The former mayor's comments followed two days of interviews on Fox News, where he said President Trump had reimbursed attorney Michael Cohen for the $130,000 he paid to adult movie star Stormy Daniels to prevent her claims about an affair with Trump in 2006 from becoming public.

The payment was made weeks before the November 2016 election, Giuliani told Fox News' Sean Hannity — and both he and Trump said the funds did not come from campaign contributions.

President Trump told reporters last month aboard Air Force One that he did not know about the Daniels payment.

Giuliani said Thursday that the Cohen case no longer affected the president, since no campaign finance laws were violated.

"I think the investigation with [Cohen] largely fell apart, with the loss of the campaign finance possible violation — which never existed in the first place — but they sure thought it did," he said.

"We don't hear anything, see anything, see any documents that contradict what we've said," Giuliani added. "Some of the recollection is a little hazy because it came during a very busy period.

"But, I mean, on both sides, it's pretty clear.

"They may have a little differences here and there, but nothing important."

Cohen is under criminal investigation by the U.S. Attorney for the Southern District of New York and faces a civil lawsuit from Daniels in California.

Besides Giuliani and Flood, other members of Trump's legal team include Jay Sekulow and former federal prosecutors Jane and Marty Raskin.

Negotiations with Mueller's investigators about a possible Trump interview continue — and Giuliani reiterated his demand that any session take no longer than three hours and address only specific topics.

"They're going to close the investigation within a month and a half or two months of the interview," he told ABC.

"We’ll get all the questions in advance, we’ll knock it down to about half of what they wanted to ask."