He's a Democrat, but he is, perhaps more often than any other one, labeled as a "DINO": Democrat In Name Only. He's so outside the party that he didn't get the Democratic nomination for his seat in November and started his own party just to run. And then the Republicans basically supported him for reelection rather than their own candidate. But after he was elected, he switched back to the Democrats from his vanity party. In name, anyway.

He's also an outspoken proponent of the Iraq war and Bush in general.