Is Limbaugh in danger of suffering from kidney failure or from some other terminal illness?
If not, then why is everyone so offended by Wanda Sykes' joke? It's not like Limbaugh is dying from the effects of a brain tumor and she joked about how he'll be dead before he gets to oppose healthcare. Put another way, it's not like Limbaugh was suffering from Parkinson's and Sykes mocked his symptoms.
As far as we know, Limbaugh isn't dying and his kidneys are just fine.
Besides, neither she nor the president are members of the Republican Party. So they're not required to apologize and genuflect at Limbaugh's bloated feet.