From a mailing list:

Just like you wouldn't buy a new car with a serious defect, nor should you vote for a politician with a serious defect and then work to fix it later. You also shouldn't buy a car with a serious defect because the only other car on the lot is an even bigger piece of junk. What should you do? Keep your money and walk, and tell the dealership that you aren't buying until they carry something that's worth buying. That is how we get quality cars, and that's how we'll get quality leaders.

Think voting for a candidate is throwing your vote away because they can't win? Vote for them anyway. Let your voice be heard.