Not to be a complete cunt (yes, I'm aware at how natural I make it look)...but this is kind of a terrible question with even a cursory glance at historical analogues (Germany, Italy, Spain, etc). There's a whole shitload of difference between democracy teetering on the brink, and full blown authoritarianism. The Republicans either have or nearly have the machinery in place to simply set aside the results of the 2024 election. If you think that dealing with their mewling is bad, wait until he has all the power he lamented about not having during his first run. There's no shortage of Trump quotes of him talking about power that he wished he had. We're a couple of years away from that going down for real.