In a nutshell, the controversy involves the leadership of the Republican Party. Michael Steele was recently elected the head of the Republican National Committee, but the conservative base is in love with Limbaugh, who was cheered wildly at this weekend's CPAC conference.
Frum's take on the role of Limbaugh in the GOP:
And for the leader of the Republicans? A man who is aggressive and bombastic, cutting and sarcastic, who dismisses the concerned citizens in network news focus groups as “losers.” With his private plane and his cigars, his history of drug dependency and his personal bulk, not to mention his tangled marital history, Rush is a walking stereotype of self-indulgence – exactly the image that Barack Obama most wants to affix to our philosophy and our party. And we’re cooperating! Those images of crowds of CPACers cheering Rush’s every rancorous word – we’ll be seeing them rebroadcast for a long time.