If I want to vote, I have to prove it is me and that I am a citizen. Anything less should not be tolerated.
The legal voting age is 18. If a teenager walked into the polling station, and got in line to vote, is the poll attendant allowed to ask for identification to prove that the teenager is 18 or older? How can a poll watcher enforce the age requirement without an ID? The answer is that they can't and that an ID is required. Well, if ID's are required for young citizens of the USA, then we must not discriminate against them. Therefore, regardless of age all people seeking to vote should be required to have a valid ID.