I happened to be listening to Rush during the show in question, where he explained his view of Michael J. Fox, and why he said what he said, and all that. I don't listen to Rush much anymore, but I happened to be in the car, and listening that day.
There was one thing that made me happy, or at least gave me a certain sense of satisfaction. It was obvious from the tone in Rush's voice, and the way he spoke, that he realized that this time, he had screwed up. He was trying to explain why he was right, and why he was being treated unfairly, and all the other things he was saying, and if the truth be told, he made some good points. (Especially: He quoted from the Fox autobiography saying that Fox sometimes manipulated meds for purposes of influencing public appearances.) Nevertheless, above it all, regardless of whether or not what he said was right or wrong, it was clear that he had cost the Republicans some votes, and he knew it, and he knew that the Republicans knew it.
Rush has gone from the "majority maker", which is what they called him in 1994, to a millstone, and he is going to lose his status as the darling media figure of the GOP. I think his era is finally over.