Trump isn't running again and he has a notoriously poor track record of picking political allies so his "chosen successor" is DOA. After 2028 it will be normal uniparty American politics as usual, with the MAGA/MIGAs going the way of the Tea Party, absorbed and homogenized into the political machine.
The hyperbole about 2024 being the last election in American history will seem silly in retrospect to most, but those who really believe it now will for the most part never admit they got swept up in hysteria and will instead pat themselves on the backs and credit themselves for America narrowly avoiding disaster. A generation or two later, young people will just roll their eyes when their parents talk about any of it, one way or the other, like millennials did when their parents rambled on about Reagan or Nixon.