The only prospective candidate who could beat Donald Trump in the presidential election is Michelle Obama, according to a new poll.
The former first lady, 60, would beat Trump, 78, by ten points, a Reuters and Ipsos survey showed, with no other possible candidates beating the former president.
It comes as Barack Obama has privately told allies that Mr Biden, 81, faces tougher odds of being re-elected after last week’s disastrous debate performance, during which the US president made a series of verbal blunders.
Support for Mrs Obama surged despite her previously ruling out running and endorsing Mr Biden’s re-election bid.
When voters were asked about hypothetical Democrat candidate matches, 50 per cent said they would vote for Mrs Obama – while just 39 per cent said Trump.