Actually, he does. That's why Rush is Rush.
He has been sort of a party cheerleader for the last few years. He used to be a conservative first and republican second but now he seems to equate conservatism to whatever the Bush administration official policy is.
I haven't had a chance to listen in the last few weeks, but he has had the habit of originally pointing out when the GOP strays from conservative ideology, but then backtracking a day or two later by trying to point out that it is really just brilliant stratergy and stealing an issue from the democrats.
I checked his website just now and from a quick look at the front page it seems like he is still in party cheerleader mode. That kind of thinking is going to get the GOP killed in November.