I like Ron Paul. Though I hope on any chance he was elected, his stance on abortion would be left up to the state (since he once supported a federal pro-life bill). There is the argument against Ron Paul concerning the private market, but it just needs pressure on it to keep it from being antagonistic.
You could elect an extremely ethical, intelligent, and motivated person, and with the way America uses its military and its "military over diplomacy" foreign policy, on top of which on a credit-based economy, he or she would be in over their head.
Iraq War Documents - Wikipedia
Afghan War Documents - Wikipedia