Adult film star Stormy Daniels is suing US President Donald Trump over a defamatory tweet about alleged threats against her.

Daniels who’s real name is Stephanie Clifford, says she was threatened by a man in a Las Vegas car park to drop her allegations of an affair with Trump.

Trump retweeted a sketch of the man, calling it "a total con job".

However Daniel's lawyer tweeted that Trump was "well aware of what transpired".

The filing to a New York federal court reads that Trump used his national and international audience of millions of people to make a false factual statement to denigrate and attack Clifford.

The suit says the president's tweet was defamatory as it accused Daniels of "committing a serious crime" of falsely accusing a person of threatening her.

Trump retweeted the sketch of the person earlier this month, calling him "a nonexistent man".

Daniels says she and the president had an affair, starting in 2006. The president strongly denies the allegation.

Source:bbcnews.com