US PRESIDENT DONALD Trump has indicated that he will not formally concede to Joe Biden and abandon his claims of mass ballot fraud.

“It’s not like you’re gonna change my mind. My mind will not change in six months,” Trump told Fox News in his first TV interview since losing his re-election bid.

“This election was rigged. This election was a total fraud,” he claimed, without backing this up. “We won the election easily.”

Despite Trump’s unprecedented attack on the validity of the US election system, his legal team has yet to provide any evidence that stands up in court.

Case after case has been rejected by judges around the country.

The latest rebuff came from the Pennsylvania Supreme Court, which yesterday turned down a lawsuit filed by Trump supporters seeking to contest Biden’s win in the state.

“We’re trying to put the evidence in and the judges won’t allow us to do it,” Trump said. “We are trying. We have so much evidence.”

Ignoring the usual boundaries between his office and the judicial and law enforcement system, Trump complained that the Department of Justice and FBI were not helping him.

They are “missing in action,” he said, also questioning the point of the Supreme Court if it doesn’t intervene.

“We should be heard by the Supreme Court. Something has to be able to get up there. Otherwise, what is the Supreme Court?” he asked.

The 2020 election was not especially close.

Biden won the electoral college vote — the state-by-state competition deciding the winner — by 306 to 232. In the popular national vote, which does not decide the result but still has political and symbolic heft, Biden won by 51 to 47 percent.

Losers of US presidential elections traditionally concede almost immediately.

But whether or not Trump ever acknowledges defeat, the Electoral College is all but certain to go through the formal motions of confirming Biden when it meets on 14 December and the Democrat will be sworn in on Inauguration Day 20 January.

Even as the clock runs down on his single term, Trump declined to say on Fox News whether he sees an expiry date for his unsuccessful legal campaign.

“I’m not going to say a date,” he said.

Asked if he saw a path to victory, he said: “I hope so.”