Quote from CaptainObvious:
I'd say it's the fact that few, if any, third party candidates has any real chance gaining entrance to the elite club in D.C. That keeps the good old boys network in tack. So, the choice on any given election day is Republican or Democrat. In otherwords, no real choice at all. When you cast your vote you're choosing to be screwed by a Democrat who will kiss you and tell you he loves you while he's porking you, OR, you can choose to get screwed by a Republican who will give you a free flag to clean up his mess. You might get a bible thrown in for good measure so that you may be guilt ridden, adding insult to injury. Some choice!