Your comment is nothing but alarmist rhetoric. I mean, each sentence is specifically engineered to be as negative-sounding as you can make it. People don't usually do that, even with actual dictators.
> being powered by
Donald Trump needs a supernatural explanation, presumably because you think he's incompetent. At the least, you're saying he can't do what he's doing by himself.
> conspiracy theorist Steve Bannon
The term "conspiracy theory" is supposed to discredit him. But, if he has trouble telling truth from reality, why is he enabling Donald Trump? People who make mistakes interpreting data lose elections.
> board member of Cambridge Analytica, an analytics firm that used psychological profiling to cynically exploit the American electorate.
It's called "marketing", and everyone here does it. Nothing wrong with it. Again, how's a "conspiracy theorist" going to exploit psychological profiling? They're supposed to see patterns where none exist, which means whatever analytics they're doing would be ineffective.
> This is an existential threat to the American public and to the world
You haven't actually described anything that could be an "existential threat". Examples include: Nuclear war, a large asteroid, an incurable highly contagious disease, etc. You can only call him an "existential threat" if you believe America and the world will literally stop existing in 4-8 years.
You did say it right after a comment about being appointed to a "national security" position. I imagine many people on HN get triggered by the phrase "national security", getting flashbacks to George Bush and the Patriot Act. If you think politicians have been abusing the term "national security" to push their bad policies, you should welcome the position being effectively removed from the President's advisory.
Nothing you've presented is really bad, so I'm not really sure how to respond to the facts. People might be interested in Stefan Molyneux's "The Untruth about Steve Bannon" video[1], though. He's not as bad as people are making him out to be.
[1] https://www.youtube.com/watch?v=uI0aAVh0dJc