US PRESIDENT Donald Trump is reportedly seeking $US20 million ($26 million) in damages from Stormy Daniels, claiming through his lawyer that the porn actress violated a nondisclosure agreement by speaking publicly about her alleged affair with the president.

Mr Trump’s personal lawyer Michael Cohen also wants the ongoing dispute with Ms Daniels to take place in private arbitration — as Ms Daniels has been litigating the matter publicly, according to The Washington Post.

The New York Post reports that filings show Mr Trump has also added lawyer Charles Harder, who is infamous for representing Hulk Hogan in a case that resulted in the bankruptcy of Gawker.

Hogan was awarded $US140 million ($180 million) before Gawker and the wrestler settled for $US31 million ($40 million).

Michael Avenatti, a lawyer for Ms Daniels, claimed that the legal manoeuvre was a “bullying tactic” aimed at “hiding the truth from the public.”

Ms Daniels has said in court papers that she slept with Mr Trump and signed an agreement just days before the 2016 election to stay silent about the affair in exchange for $US130,000 ($168,000).