I'm of the belief that attempts to legislate corporate American and money out of our politics is a fool's errand. All that ever ends up happening is it affects the rest of us in unintended (or maliciously intended) ways. No matter what law you come up with the money will make it into politics, the only way you'll stop it is by going so far as to infringe on our rights. They'll still find a way, or it won't matter as they won't need to since we legislated our rights out of existence.