What if everyone got two votes? You can use one or both or neither, but if you use two they can't both go to the same candidate. It might provide third partys a more welcome place in politics, since they wouldn't be "spoilers" anymore. What if many of the people who voted for Nader could have also voted for Gore? That's one question... the other is, what if many of the people who voted for Gore could have also voted for Nader? Is there some glaring problem with this that I'm not seeing?