Why do so called conservatives...

Why are "conservative" talk show host dismissing Ron Paul as a Presidential candidate? I have been on the Sean Hannity and Mark Levin radio programs and both of them dismiss Ron Paul and then claim to be conservatives. I think the reason is because both Sean Hannity and Mark Levin are fake conservatives! There is no way to support George Bush and call yourself a true conservative. Ron Paul is the ultraconservative candidate because he votes only according to the Constitution!