Rush is an entertainer, so he’s going to have a tendency to say whatever is most divisive at the moment. I wouldn’t be surprised if he makes more $$$ having Democrats in office.
You're only partially right about that. If Rush was simply an "entertainer", he wouldn't have had nearly the success he has over the last couple of decades, and he wouldn't be under near-constant attack from the left.
It's not a stretch to say that he is the voice of conservatism in the modern age. The fact that he tries to make his show 'entertaining' is an added bonus, nothing more.
That said, he royally screwed the pooch today, and I am utterly disappointed in him.