Fox News commentator Judge Andrew Napolitano said Monday that special counsel Robert Mueller "believes" Paul Manafort has compromising information on President Donald Trump that he will try to make a deal to secure.

Napolitano said on "America's Newsroom" that Manafort, the former chairman of Trump's campaign, has "exacerbated the case against him" by filing a "frivolous" lawsuit against Mueller and Deputy Attorney General Rod Rosenstein claiming that their investigation has overstepped its bounds.

"If you think that the prosecutor who's prosecuting you lacks the jurisdiction, the legal authority, to prosecute you, you bring that to the judge before whom your case is assigned," Napolitano said.

"You do not try and drag another judge in on a civil case so that you can interrogate the prosecutor."

Napolitano affirmed that Manafort is "in trouble," and that he believes "that the special prosecutor believes Paul Manafort has information about the president of the United States, and he has indicted Manafort for essentially money laundering in the hopes that Manafort will say, 'Uncle. Here's what I know about the president. Go easy on me.'"