This is a choice quote:
Milwaukee Magazine : Feature Story : Secrets of Talk RadioA smart talk show host will, from time to time, disagree publicly with a Republican president, the Republican Party, or some conservative doctrine. (President Bush’s disastrous choice of Harriet Miers for the Supreme Court was one such example.) But these disagreements are strategically chosen to prove the host is an independent thinker, without appreciably harming the president or party. This is not to suggest that hosts don’t genuinely disagree with the conservative line at times. They do, more often than you might think. But they usually keep it to themselves.