How will Donald Trump be escorted from the White House if he continues refusing to concede?

Incumbent President Donald Trump continues refusing to concede the US election, despite reports his advisers are doubtful about legal action alleging voter fraud, without evidence.

Democrat Joe Biden on Saturday (local time) clinched victory in the election as he won a series of battleground states to exceed the 270 electoral votes needed in the state-by-state Electoral College that determines who wins the presidency.

During the campaign, Trump had refused to commit to a peaceful transfer of power and has yet to concede.

He may, as a result, be forcibly removed from the White House and the incoming Government is prepared to take such action, according to Andrew Bates, a spokesperson for Biden's campaign.

"As we said on July 19th, the American people will decide this election," Bates told CNN. "The United States Government is perfectly capable of escorting trespassers out of the White House," he said in a statement.

Trump has lodged a flurry of lawsuits in pivotal states to try to back up his unsupported claims of widespread voting fraud.

"WE WILL WIN!" Trump said on Twitter.

"People will not accept this rigged election!" he wrote on Wednesday.

But Trump's advisers are reportedly acknowledging, behind closed doors, that Biden's official victory is imminent, the Washington Post reported.

What happens if Trump won't leave the White House?

Some prominent Republican lawmakers and other Trump allies have backed the President's strategy, saying he has the right to contest the results of the election.

The election outcome in a small number of states remained undecided with Trump holding a lead in North Carolina and Biden ahead in Arizona in addition to Georgia. Recounts are unlikely to change the outcomes.

So if the refusal continues until January 20, when the Presidential mandate officially changes over, Trump would be escorted away by the Secret Service, according to Newsweek, citing an executive involved in transitioning the Barack Obama and Trump administrations in 2016.

"The transition process is automated. There is no 'do-it-yourself' move," added Malcolm Nance, a former counter-terrorism and intelligence specialist for the US Navy.

"Basically, the systematic things will happen whether he's a willing participant or not," Nance told Newsweek.

Reuters / Newshub.