Sadly, I think Michael J. Fox's life will one day be the subject of a TV movie, more for his battle with Parkinson's than for his achievements as an actor. I just hope it doesn't get that tawdry "Behind The Scenes" treatment, most recently seen with the cast of 'Diff'rent Strokes'.
And at some point in the second hour of that TV movie, a pivotal scene will be his involvement in the 2006 election, campaigning for candidates who support stem cell research. And with that will come the portrayal of Rush Limbaugh, who spoke out against Fox. (He apparently went so far as to claim that Fox was "acting" out the symptoms of Parkinson's and not really experiencing them.)
I don't know who they would cast as Limbaugh, but that actor is going to have a tough time of it. After all, any dramatization of that bloated gasbag will be a pale copy to the original.