President Donald Trump's personal lawyer asked a federal judge on Monday to force adult film star Stormy Daniels to use arbitration to settle a dispute over an agreement to keep quiet about a sexual encounter she says she had with Mr Trump.

Daniels, whose real name is Stephanie Clifford, last month sued Michael Cohen, Trump's personal attorney, to be released from the non-disclosure agreement she signed in October 2016 in exchange for $130,000.

The White House has denied that Trump had sex with Daniels. Mr Cohen has said he paid Daniels out of his own pocket.

In Monday's court filing in Los Angeles, Brent Blakely, Mr Cohen's attorney, argued the agreement included a provision that any disputes over it be settled through arbitration, as opposed to open court.

Federal law "dictates that this motion be granted, and that Clifford be compelled to arbitration, as she knowingly and voluntarily agreed to do," Mr Blakely wrote.