Biden is already cracking down on peaceful protesters who support Palestinians, it isn't much of a stretch to start going after people more broadly. Biden has already "put every single university and college president on notice,” and Republican congressional members are doing McCarthyist witch hunts.
If you actually pay attention, the stuff Trump says he's going to do is already happening.
By the time we get to the election it's already going to be much worse than it's already gotten, and you will vote for it.