The only people claiming Trump will overturn the election results are Trump and his team

Because everyone else, including the experts in both parties, are saying he can't and won't. Trump's latest lie is that that supreme court will save him, but they won't, because the supreme court is bound by the law, and the law requires REAL evidence of voter fraud, which there is none, the 'evidence' of voter fraud Trump and his people say is evidence is not, none of it, and judge after judge, regardless of political party, has said so.

And Trump is hurting not only himself, but republican candidates, in future elections, because his supporters always believe anything he says, and thus they are going to believe the election is rigged, hence many of them will not vote in future elections, out of anger or distrust of the system.

So basically, what's going to end up happening, is that Biden will be sworn in on January 20th and many Trump supporters will never vote again. That's what republicans get for putting one man over their own party.