It's not that as much as he's very anti McCain.
But then again, so am I. What part of "Congress shall make no law" is so hard to understand? What other parts of the Constitution does he think are optional? The man is a domestic enemy of the Constitution.
(I also don't want him near Air Force One, he might add it to his "bag" of US Military Aircraft. )
McCain is a politician who happens to be a Republican. Rush esp. dislikes his pandering and kissing up to the drive-by media.
And campaign finance reform, illegal immigration amnesty, the judicial deal with the Moderate Seven... and the list goes on.
Rush has already said that neither McCain nor Huckabee can win in the general election. Conservatives will stay home.
I agree, and will be one of those sitting this one out. ( If either of those two wins/steals/lies their way into the nomination)