OP’s hypothetical assumed evidence of fraud and legitimate court decisions that overturned Biden’s victory.
As many have already pointed out, this is purely hypothetical. If there was any evidence, it would have been presented in court. In fact, the withdrawal of the Michigan lawsuits and the effort now to get legislators to disregard the election points to the fact that Trump’s lawyers themselves know they have no evidence despite what they claim in press conferences.
Nevertheless, I think the question is a fair thought exercise. For every person who is disgusted by trump, there’s a 0.95 person who liked him enough to vote for him. If you’re happy with the results, it’s easy to say that’s the way democracy works. Losing is hard, especially if you believe a lot is at stake.
So taking the hypothetical at face value, we are stipulating that proof of fraud was presented and that, as a result, there are fully transparent and objectively legitimate court decisions overturning Biden’s victory.
First of all, Biden thus far has been a gracious winner. He talks about bipartisanship and being president for all Americans regardless of who they voted for. Rhetorical, maybe, but so far he hasn’t shown he’s giving the keys to radical progressives as many republicans claimed he would. No one should expect Trump to be gracious if he wins. He will gloat and call for investigations and prosecution for treason (raises the question of whether those things can be applied to him now, but that’s another topic) and spend the next 4 years talking about the 2020 election rather than doing the work of being president. He will double down on divisiveness. If you thought it couldn’t get worse, of course it can.
No amount of objective legitimacy will prevent mass demonstrations and probable violence. There were demonstrations after the 2016 election, but this will be on a much larger scale. Trump has already used military force against demonstrations. No doubt he will do it again, which of course will only serve to further incite violent demonstrations. Hard to know how or if that cycle will end. Trump only escalates, reconciliation is for losers.
Personally, I have been looking forward to post election and say good bye to the constant news cycle. If Trump’s goal now is to get as much negative attention as he can, he is succeeding. Everyone wants to know how it will end. The only thing universally agreed on is that he will never actually concede, but he might just drop the topic. Will he slink off to Maralago for Christmas and not come back (not like he’s been doing much since the election)? Will he pardon himself? Will he have to be physically removed as a trespasser on Jan 20, kicking and screaming that he’s the real president? But that’s it: on Jan 21, I’m deleting news apps. Hopefully, Joe Biden’s presidency will be so boring we’d all rather stare out of a window and look for animal shapes in the clouds. Actually, that sounds like fun as long as I don’t see trump’s profile.
So hypothetically, if Trump did really win, the drama will not end for another 4 years. No staring out of windows. Phone calls with relatives will continue to be dominated by discussion of the latest in presidential politics. Children will know more about politics than I ever knew or cared to know at their age. I’m already exhausted, and it’s just a hypothetical.