Trump has virtually no record in politics worth mentioning, he doesn't ascribe to any ideological faction in American politics, he has little record of philanthropy, he makes up his policy stance on-the-spot, his campaign is entirely funded by private small-donors,
The only reason he's one of the two major candidates in the general election is because he's a celebrity and he's plainspoken and says all the right things to the right demographics.
This worries me because it appears as though there are apparently no credentials by which one has to be vetted for the highest office in the land. Literally anyone popular enough can gain that power.
Trump may have fucked up one too many times in the past to win this, but what happens when eventually a candidate who is a public name, willing to speak the right way, and say the right things to the right people, comes along without any record of past fuckups?
It's very conceivable that person could achieve the office of presidency, and they could be motivated by the relative success that Trump has had to this point. But there's really no telling what such a person could be capable of.
I've never quite had a sense that the US or the World were in any real danger despite disastrous mistakes that were made in the past during my lifetime. I always had some sense that the systems are all in place to prevent any catastrophic mistake.
But this election has sort of fundamentally changed my mindset. Right now I feel like it's quite conceivable, and if nothing else changes, then probable, that at one point we're eventually going to elect a candidate that will prove to be an apocalyptic-level mistake. And we don't have any fail-safe or bureaucratic mechanisms in place to avert such a failure.