The constitution gives citizens the absolute right to vote, and does not have any mention of requiring an ID. However, the 2nd amendment does call for regulation of arms sales. Taking someone's ability to vote away because they don't have ID is unconstitutional. It is clear from those facts that is is thus incumbent upon the state to prove someone is NOT qualified to vote before they can be stopped. It is just like innocent until proven guilty. You are innocent of voter fraud until proven guilty, and are NOT required to incriminate yourself by supplying the state with any evidence. You have the same right to vote as you have to life itself.