Ken Starr said Monday he thinks it is "probable" that 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 will interview President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE in the Russia probe.

"He needs to, in order to round out, complete his investigation, to come to a decision," Starr, the independent counsel in the Whitewater and Monica Lewinsky scandals during Bill Clinton’s presidency, said during an interview on CNN's "New Day."

"He needs to look the president in the eye and ask the appropriate questions."

ADVERTISEMENT

Starr was pressed on whether a face-to-face with the president is legal and appropriate.

"It's certainly legal and it is appropriate," Starr said.

He added that the meeting would likely be "negotiated," saying: "The last thing that we would want would be for the president to actually be subpoenaed to appear before the grand jury."

"The office of the presidency demands our respect and deserves our respect and so the right way to do it is through counsel to negotiate — here are the terms of the interview," he said.

Mueller is investigating Russian interference in the 2016 presidential election and possible collusion between Trump's campaign and Moscow.

According to a report published Monday, Trump's legal team is talking about possible formats in case Mueller asks to interview Trump in the Russia probe.

Three people familiar with the matter told NBC News that lawyers for the president had spoken with FBI investigators about a potential interview.

Trump has repeatedly dismissed the Russia probe as a witch hunt and has denied collusion.

Starr has in the past offered praise for Mueller's investigation. In October he called Mueller's handling of the investigation aggressive and professional.