Donald Trump's claims of fraud could impact Joe Biden's legitimacy as President, says expert

As the US election count drags on into its third day Donald Trump's campaign is throwing every spanner they can find into the works.

The campaign has launched legal action in battleground states Michigan, Pennsylvania and Georgia, pushing for vote counting to be stopped over claims of voter fraud - for which the campaign has been unable to produce evidence.

In Pennsylvania, they have been granted permission to watch the counting of ballots but Georgia and Michigan have tossed out the lawsuits. 

While his campaign team may have little legality to stand on, veteran broadcaster and US correspondent Simon Marks says their efforts could mean trouble for Democratic challenger Joe Biden.

"It may be the results from Nevada, Pennsylvania, Georgia allow [Biden] to go on and claim victory," he told The AM Show on Monday.

"But even if he does that and Trump agrees to leave office - the President won the support of 68.4 million Americans and he's telling them all this process is illegitimate and if Biden becomes President he wont have any legitimacy to occupy in the Oval Office."

Despite the efforts of Trump's campaign experts say there is little chance it will change the outcome of the election.

"The current legal manoeuvring is mainly a way for the Trump campaign to try to extend the ball game in the long-shot hope that some serious anomaly will emerge," Robert Yablon, a professor at the University of Wisconsin-Madison Law School told Reuters.

Marks agrees, saying the team is throwing everything it has at the wall and seeing what sticks.

"If they had a kitchen sink they would fling that at these races in a bid to either slow the process of vote-counting down or get many of these postal votes thrown out all together."

Biden is currently ahead in the race for Presidency with 253 electoral college votes in comparison to Trump's 214. The first candidate to hit 270 will become the 46th President of the US.