This is not ideology at work. It certainly has a fascistic and authoritarian character, and there are people around him who fit that description perfectly. But Donald Trump is the ultimate decider, and he cannot be said to have any belief in anything but himself. He is ruling by threats and extortion, period.
He is a tyrant.
https://www.rsn.org/001/trump-is-something-worse-than-a-fascist.html