Hannity is a conservative television host known for passionately advocating for Trump on his Fox News show, and often receiving public praise from Trump in return. Sometimes Trump praises Hannity in return.

The disclosures came at a hearing at which Cohen is trying to stop federal investigators from sifting through a trove of tax records, business documents, emails and other material that FBI agents seized in court-approved searches of his apartment, hotel room, office and safe deposit box last week. The investigation has frustrated the White House as it has spread to enfold some of Trump's closest confidantes.

Michael Cohen's attorneys Monday revealed Hannity as the third unnamed client of Cohen's, a disclosure that came as Cohen's attorneys tried to persuade a federal judge in NY to delay prosecutors from examining material seized in FBI raids of Cohen's home and office last week on the grounds many of them are protected by client-attorney privilege.

"He has played by a different set of rules, or should we say no rules at all", she said of Cohen.

Wood said she would eventually order that copies of all the seized records be turned over to Cohen, but in the meantime instructed lawyers for all sides to come up with search terms that could be used to try to determine which records taken from Cohen pertain to Trump.

Daniels, whose real name is Stephanie Clifford, was another.

Joseph Evans, right, and Todd Harrison, left, the lawyers for Michael Cohen, outside Manhattan Federal Court in NY on Friday. "I understand that he doesn't want his name out there". He tried everything to keep it secret, but the judge ordered him to reveal the name of client number three. "I had brief discussions with him about legal questions where I wanted his input and perspective".

Hannity added, "not one of any issue I ever dealt with Michael Cohen on ever, ever involved a matter between me and any third party".

Eventually, though, Cohen attorney Todd Harrison submitted Hannity's name - a claim Hannity nearly immediately denied.

Legal advice can be considered privileged even if given by a lawyer for free.

Hannity opened his show by tearing into James Comey's ABC interview last night, and he had Dershowitz on to talk about the criticisms he offered for the former Federal Bureau of Investigation director earlier today.

He never mentioned anything to his viewers about his own dealings with Cohen.

"I mean, he has a meeting with Sean Hannity, right?"

Lawyers for Cohen and prosecutors both had reason to claim success after three hours of arguments before U.S. District Judge Kimba Wood, who said she may appoint a special master, a neutral lawyer, to help decide which materials should stay confidential. It is paramount that the review of Mr. Cohen's data and documents be handled in such a way as to eliminate, as much as possible, even the 'appearance of unfairness, ' " they argued in a letter to Wood. The firm said last week it had split with Cohen but that it had been in touch with federal investigators about a warrant related to him. He is a great attorney, about legal questions I had.

"In terms of perception of fairness - not fairness itself, but perception of fairness - a special master might have a role here", Wood said.

The government has proposed that Cohen's materials can be reviewed by a walled-off "taint team" of prosecutors that will judge which material is relevant to the investigation and filter out documents that should be kept private.