The state of the union isn’t all that one might hope, but it could clearly be a whole lot worse.
So what are Trumpistas and Bern-feelers rebelling against?
One answer might be that they’re fed up with exactly this — the politics of “it could be worse,” of stagnation and muddling through. They aren’t revolting against abject failure, or deep and swift decline. They’re rebelling against decadence.