Lawyer Alan Dershowitz said Wednesday on Fox News that special council 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 isn't partisan but can be an "overzealous prosecutor."

"I know Bob Mueller. I've known him for years and years and years. He is fair," Dershowitz told Fox anchor Sandra Smith on "America's Newsroom."

"He sometimes is thought of as overzealous," he said. "I don’t think he's partisan. I don't think he cares whether he prosecutes Democrats or Republicans, but I think he is very, very tough and sometimes can be an overzealous prosecutor."

Mueller is leading the investigation into possible collusion between Trump campaign associates and Russian officials in 2016.

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The Harvard Law professor said he also believes some of the people working for Mueller are "very overzealous," with some expressing "partisan interests."

"And he certainly has some people working for him that are very overzealous and some of them who have expressed some partisan interests," he continued, likely referring to recently unveiled texts between FBI agents assigned to Mueller's probe. "So we’ll wait and see if it can be fair."

Dershowitz went on to speculate about where Mueller's probe will go from here.

"I think the most important question now is whether the president submits to an interview. And remember that ultimately Mueller has the power to subpoena him in front of a grand jury where he doesn’t have his lawyer, where there are no limits on time and where there are no limits on the scope of the questions," Dershowitz noted.

The president's legal team reportedly is at odds over whether the president will agree to an upcoming interview with Mueller, with those opposing reportedly fearing a perjury trap.

The president has said he will talk to Mueller if asked, but added that the decision would ultimately be up to his legal counsel.

"Now, when you subpoena the president, obviously the president has some political pushback that he can use, but no legal pushback," Dershowitz continued. "The law is clear that a president can be subpoenaed, deposed. The Supreme Court ruled on that 9-0 in the [former President] Bill Clinton William (Bill) Jefferson ClintonBarr says Ginsburg 'leaves a towering legacy' Trump reacts to Ginsburg's death: 'An amazing woman who led an amazing life' Jimmy Carter remembers Ruth Bader Ginsburg as 'a beacon of justice' MORE case."

Dershowitz, who says he voted for Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE and isn't a Trump supporter, referred to a 1997 case when the Supreme Court ruled the Constitution does not shield a sitting president from having to defend in civil lawsuits unrelated to his official duties.