'We won't rest': Joe Biden warns Donald Trump as US election 2020 nears climax

US democratic nominee for president, Joe Biden, warned American President Donald Trump on Wednesday, hours after Trump claimed election victory and alleged rigging was taking place.

"We won't rest until everyone's vote is counted. Tune in as my campaign manager @jomalleydillon and campaign adviser Bob Bauer give an update on where the race stands," he tweeted.

The American presidency remains up in the air as analysts and pundits struggle to predict a clear winner for the 2020 US Election. Chances are still 50-50 for both Joe Biden and incumbent US President Donald Trump, with many key states still too close to call for either candidate due to the tight race between the two candidates.

Some have predicted that the final result of the election may take "days", leading to fears that the resultant uncertainty may stoke civil unrest as an incredibly charged election campaign reaches its conclusion.

US President Donald Trump — who made a surprisingly strong showing in the polls, negating critics who had predicted an easy defeat — has already claimed election fraud and declared an illegal victory. He has made clear that he believes his mandate his being snatched and the "real result" has already been delivered.