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Judge Andrew Napolitano believes Special Counsel Robert Mueller -- who's investigating whether the Trump campaign colluded with Russia -- will investigate President Trump's alleged affair with adult film star Stormy Daniels. 

Daniels, whose real name is Stephanie Clifford, has claimed that she received a $130,000 payment from Trump's personal attorney, Michael Cohen, days before the 2016 presidential election in exchange for her silence about a purported 2006 sexual encounter with Trump.

Cohen -- who has denied that Trump had an affair with Daniels -- has said he paid the $130,000 out of his own pocket, and that neither the Trump Organization nor the Trump campaign was a party to the transaction with Daniels and he was not reimbursed for the payment.

On "Outnumbered Overtime" on Monday, Napolitano said if the money indeed came directly from Cohen, then it could be a potential violation of campaign finance law, as the payment could be seen as a contribution to the Trump campaign.

"If it truly came from him, then it was a benefit, it was a donation to the campaign, which vastly exceeds the amount a single person can donate, which is $2,700. And then the campaign's failure to report it to the regulatory authorities was an error -- intentional or inadvertent -- on the part of the campaign."

Host Harris Faulkner asked Napolitano if Mueller will pull this into his investigation, to which Napolitano emphatically answered, "Yes."

"I don't think Bob Mueller wants to pull this in, but I think he understands his mission is pulling in whatever he can," Napolitano said. "That's the problem with special counsels. They will pull in everything, even [alleged] money laundering in the Ukraine four years before the election."

Watch the "Outnumbered Overtime" segment above, and see Napolitano advise Trump to take Mueller's probe seriously.

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