You have not answered the argument- because you can’t, my friend.
Romney is a moderate, at best— Rush purportedly has disdain for moderates— but yet, not once, has he come out and said vote for Newt/Santorum/Perry, anyone but Romney. Why????
Maybe you should listen to him more, he has repeatedly said he has nothing to gain from doing that. If he had jumped on the Cain wagon or any other for that matter, how would he look now. Unlike the freepers that post here he makes a good living by trying not to make an a$$ of himself.
It sometime maddens me but as far as he and his show is concerned it makes sense for him not to endorse, until the race for all practical purpose is over.
Having said that he has done all the attacks on Obama for them, they mostly haven't taken advantage of it.