All of it. Proof that it happens on such a scale as to actually be a problem, and proof that those measures you speak of are not just thinly veiled attempts to

All of it. Proof that it happens on such a scale as to actually be a problem, and proof that those measures you speak of are not just thinly veiled attempts to disenfranchise voters. If you're going to mess with the people's right to vote, you had better have a damn good reason.