Donald Trump’s lawyer says the US president doesn’t believe Stormy Daniels’ hush-money agreement is valid and won’t carry out a threat to sue the porn star for discussing her alleged affair with him.

Trump’s lawyer, Charles Harder, said in court papers filed on Saturday the president never believed he was a party in the agreement, which he didn’t sign.

Daniels, whose real name is Stephanie Clifford, claims she had an affair with Trump in 2006, which Trump denies. She was suing to invalidate the nondisclosure agreement.

The company set up by Trump’s former personal lawyer to handle Daniels’ contract offered to rescind the agreement and dropped plans for a threatened $US20 million lawsuit against her.

Daniels’ lawyer, Michael Avenatti, says Trump is “desperate” and trying to get out of having to answer questions under oath.

Daniels said she had sex once with Trump in 2006 and carried on a platonic relationship with him for about a year.

She was paid $US130,000 as part of the agreement signed days before the 2016 election and is suing to dissolve the contract. Daniels has argued the agreement should be invalidated because Cohen signed it, but Trump did not.

In Saturday’s court filing, Harder, said the president doesn’t dispute Daniels’ assertion that the contract isn’t valid and never considered himself as a party to the agreement.

Both Trump and Cohen have asked Daniels to now drop her lawsuit.

-AAP