Hypothetical Question: What would happen if someday Americans elected a deranged, vengeful maniac to be President of the United States?

I feel as if I am either experiencing a nightmare, or that this is a bad made for TV movie. The sad thing, is that there seems to be no end to the incredibly inane things the republican party seems to be capable of doing.

We’re finding out in real time.

Vs a passive one that lets domestic terrorist take over the world and country?