This is probably going to be a (very) unpopular post.

[Ocelot II]

30. Dementia deterioration isn't linear. The symptoms come and go.

Like most people with that condition, he's can be (relatively) lucid one day and produce nothing but gibberish the next. I don't think there's much doubt in anyone's mind that his thought processes have become more and more incoherent over time; the fact that on some days he seems like a relatively normal though stupid and obnoxious old man doesn't mean his brain isn't turning to mush. It's just that there are still days were he can use the parts that haven't yet reached the consistency of tapioca. As to the evil part - it's quite possible to be both senile and evil, but Trump isn't good at details even on his lucid days, and he's lazy. He needs evil people like Miller and the other orcs that populate his regime to execute the evil, like Hitler needed Goering and Goebbels and Himmler. Trump gets ideas from Miller and the others, and from whatever toxic crap he gets from Fox "News," and he sends the flying monkeys out to do the job.