What is the question here, I mean, the point of this thread? Limbaugh has supported black candidates, female candidates, all kinds of shapes and sizes of candidates, as long as he believes in their message.
So is this fuss all about "Imus got canned, so let's get Rush fired?" Because the truth is that in America a candidate's religion, gender, race, height, and hair style are used as a measuring stick by voters, for better or worse, usually worse. Clearly Obama's race plays an enormous role in how he is being scrutinized by potential voters and donors. It is fair game for Limbaugh to mock the sanctimony of those caught in Obama's spell due to his race.
And again, again, again, if you don't like the radio show, don't listen.