Because he's the only person running who's not a Democrat.
I am horribly unhappy with what is available from either party. All three choices suck in my opinion. You get a choice between selling out to Kenya (Obama), China (Clinton) or everyone (McCain). It's a lose, lose, lose situation.
In the end I'll probably suck it up, hold my nose and vote for McCain, but I won't be holding him up on my shoulders.
Spirit of party will be the downfall of The U.S.A. - Paraphrase of President George Washington