A: Ron Paul would never, ever win. As much as I hate to say it, voting for a 3rd party in the US is a total waste of a vote.
B: He's a Libertarian. I'll admit, there are aspects of it that I agree with(legalization of gay marriage, marijuana), but the idea that the country would be better off with no taxes, no regulations on business, no welfare, etc, etc, is ridiculous.
Anyone played Bioshock!? There ya go.