Trump accused of sexual misconduct, but denies claims

US President Donald Trump has rejected calls for an investigation into claims of sexual misconduct, saying he doesn't know the women who accuse him and calling it a political attack by Democrats.

His comments on Twitter on Tuesday come one day after the White House said it had eyewitnesses who would clear him of any suspicion of wrongdoing amid the allegations, which surfaced during the 2016 presidential campaign.

On Monday, three women who previously accused Trump of misconduct called on the US Congress to investigate the president's behaviour but Trump denied the allegations and the White House says the women are lying.

(L-R) Rachel Crooks, a former receptionist in Trump Tower in 2005, Jessica Leeds and Samantha Holvey, a former Miss North Carolina, exit a news conference for the film "16 Women and Donald Trump". REUTERS/Andrew Kelly

Trump's suggestive tweet was an attack against a Democratic  US Senator Kirsten Gillibrand who has called for his resignation after the women renewed their sexual misconduct allegations against him following similar calls by four other male Democratic Senators in recent days.

More than a dozen women have accused Trump of making unwanted sexual advances against them years before he entered politics.

Despite thousands of hours wasted and many millions of dollars spent, the Democrats have been unable to show any collusion with Russia - so now they are moving on to the false accusations and fabricated stories of women who I don't know and/or have never met. FAKE NEWS!" Trump tweeted.

Despite thousands of hours wasted and many millions of dollars spent, the Democrats have been unable to show any collusion with Russia - so now they are moving on to the false accusations and fabricated stories of women who I don’t know and/or have never met. FAKE NEWS!

— Donald J. Trump (@realDonaldTrump) December 12, 2017

Many of Trump's accusers came forward after a tape surfaced one month before the November 2016 election in which Trump was heard bragging in 2005 about groping and forcibly kissing women.

Trump later publicly apologised for the remarks but called them private "locker-room talk" and said that he had not done the things that he had described.