Any person that listens to Rush after 1991, 2000 or more recently 2006 is a distinguished mentally-challenged fellow. In 1991, he spent an entire year lambasting Bush Sr. about his tax increases and etc .. then coddled up to him in the primary because he was invited to the White House (a move that signified his importance in the party). Right there should tell you the guy has zero principles about what he believes.
In 2000, he constantly attacked McCain as "not being conservative enough" and championed GWB as the best candidate in the field. There is no doubt he was a deciding factor in some the key southern states that carried Bush to the win.
Then in a (not so) amazing turn of face, after the humiliating defeat in 2006, he admits that he has been "carrying the water" for GWB and he will not do it anymore. He has not supported them for quite some time and doesn't believe in him. Basically, telling his audience that he lied to them the entire time just so they would go out and vote. How anyone could take this buffoon seriously after this, just boggles my mind.
That's not even touching all his hypocrisy on the drug issue or other moral failings he has. Which should be a concern to any moralists still in his audience.