White House insiders do not expect Donald Trump to accept reality and concede in the near future, CNN reports.
The US President is hellbent on accusing the Democrats of "trying to steal an election", alleging voter fraud by mail-in ballots without any evidence.
Trump is feeling embittered that he has lost the race, sources both inside and outside his campaign have told CNN.
Advisors have described Trump as grasping at straws he sees reported on Fox News.
He may never accept this reality, one advisor told CNN.
"He has no concession speech ready and no intention of recognising Joe Biden's presidency," a Republican source told the Daily Mail.
US Vice President Mike Pence's advisors are unwilling to affiliate him with Trump as the situation is dragged out.
One source related to the situation said Pence wants to preserve his options for 2024, according to CNN.
In September, Trump was asked whether he would commit to a peaceful transferral of power after the election if he lost.
"Well, we're going to have to see what happens," Trump responded.
"You know that I've been complaining very strongly about the [mail-in] ballots.
"Get rid of the ballots and we'll have a very peaceful – there won't be a transfer, frankly. There will be a continuation."
On Saturday, Republican Senator Ron Johnson said half of the US would not accept the election result if Biden wins.
"It's very unfortunate that no matter who wins, the other half of America is not going to view this as a particularly legitimate election," Johnson told AP.
"That's a real problem. I'm not saying it's legitimate or not. I'm saying this process has been set up where people are not going to view it as legitimate. And that's a real problem."