To aid my credibility, I'll note that I've met and spoken at length with Ron Paul, Lew Rockwell, and Bob Barr. They're nice people, but I've since moved away from Libertarianism and towards the only logically and morally sound position. Now on to my rant:
It's too little, too late.
When America was founded, we intended an ideal state which limits its actions to those which are moral on an individual level (as opposed to the doctrine of European nations, where murder and robbery were considered immoral, but wars and massacres were justified).
After two and a half centuries of unjust wars, genocide of Natives, slavery, suppression of States' rights, eminent domain, segregation, and most recently, the requirement that all citizens buy health insurance (because that surely affects interstate commerce!) the conclusion is simple:
Just government is impossible. Every nation, no matter how lofty and noble its aims, will devolve into a bloated, corrupt bureaucracy that suppresses the rights of individuals and siphons wealth to its ruling elite. America has failed. My advice: withhold your vote, thereby diminishing the legitimacy of our government, and doing your part to quicken the eventual demise of Leviathan.