You’d think a hegemony with a 100-years tradition of upkeeping democracy against major non-democratic players, would have some mechanism that would prevent itself from throwing down it’s key ideology.
Is it really that the president is all that decides about the future of democracy itself? Is 53 out of 100 senate seats really enough to make country fall into authoritarian regime? Is the army really not constitutionally obliged to step in and save the day?
I’d never think that, of all places, American democracy would be the most volatile.
Check and Balance was intened to stop bad individuals, not an entire political party working in unison to destroy the system.
Honestly, no amount of careful planning and constitutional design will restrain a society where enough people have gone completely insane. Look at “Israel”. Even 100% direct democracy there would still be a genocidal nightmare. Gets to the problem of how culture is the real driver behind the shape of society. And in that case, how religion incinerates real morality.