I don’t believe Rush underestimates Trump at all. I think Rush gets it completely. He’s tried his hardest to help people understand—and they are simply incapable of getting it. It’s not that they won’t—! They can’t.
Their righteousness & arrogance blinds them to understanding (and they are afraid - in their minds, they believe ‘understanding’ means ‘agreeing’).
Rush knows one has nothing to do with the other!
You nailed it.
Agree with the rest.
They also believe engaging with Dems equals making a bad deal.