Pressure builds on Biden as news conference fails to stop rebels

Joe Biden's press conference in which he insisted he was still fit to run for US president has failed to silence critics from his own party.

Three Democratic politicians joined the growing list calling on Mr Biden to drop out of the US presidential race.

Calls for the 81-year-old to step aside have escalated since he stumbled through a TV debate with Republican Donald Trump last month.

At an hour-long briefing taking reporters' questions on Thursday night he was more steady and fluent but there were also gaffes. read more