A woman who accuses Democratic White House candidate Joe Biden of sexually assaulting her 27 years ago has called on him to quit the race.

Tara Reade challenged Mr Biden in an interview: "Please step forward and be held accountable."

She added: "You should not be running on character for the president of the United States."

Mr Biden, who is likely to challenge President Donald Trump in November, has denied Ms Reade's allegation.

The Democratic party's presumptive presidential nominee appeared on morning television last Friday to brand the allegations "false".

Ms Reade, 56, worked as a staff assistant to Mr Biden from 1992-93 when he was a senator for the US state of Delaware.

She has said that in 1993 he forced her against a wall and put his hands under her shirt and skirt after she delivered him his gym bag.

In an excerpt from an interview with Megyn Kelly aired on Thursday, Ms Reade was asked by the presenter if she wanted Mr Biden to withdraw from the race.

"I wish he would, but he won't, but I wish he would," she said. "That's how I feel emotionally."

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