I don’t recall him ever even mentioning it more than once in a show. He did not sound terribly positive about it, just mentioned it.
Qanon?
I heard a caller ask something about Qanon some long time ago. Rush deflected the subject. He might have mentioned it sometime when I missed it, but my impression is that he has assiduously avoided the subject - neither pro or con. If he anticipated the subject becoming a political issue at some future time, perhaps he wanted to be able to be an impartial commentator on the matter.
I don't recall him ever expressing ignorance of Qanon.