Okay let me get this straight : Drivers's liscenses don't count as Voter iDs ?

[pbrower2a]

A driver's license or an official state ID card (which might be available to people who cannot drive or are priced out of driving a car) has typically been the most widely-distributed form of identification. We do not yet have internal passports which would be appropriate if we had checkpoints at state lines... I'm not sure that we want those.

The definitive proof of personal identity has typically been a signature for the purposes of signing a contract to get something. There were only two signatures that I ever found easy to forge, but those were of my parents. They would have caught me if I had signed either of their names on a credit application for a big-ticket purchase such as a car. A signature was adequate for voting or signing other documents such as deeds when photography did not exist or was prohibitively expensive for banal use.

A signature remains definitive evidence of identity. There might be hundreds of thousands of people named "Pedro Martinez" in America, but only one of them is the Hall of Fame pitcher. Signatures can identify everyone using that name. For this I am picking on Hispanics for having relatively few common surnames. It's even more blatant for Koreans and Korean-Americans. Which "John Kim"? A signature, again, is definitive.

Signatures are reflections of personality, which fosters the science and pseudoscience  both known as "graphology".  They rarely change much over time, but they do. At one point I started using a (Greek) epsilon instead of the more common "loop" e so that I could avoid having my signature confused with the very common surname "Brown".  But that begins at a certain time. It would be possible to see my signature from forty years ago suggesting the same person that I am now, except that the subtle changes would indicate that one was done forty years before the other. (My signature connects my given name, middle initial, and last name through loops; it is conventional but heavy and fast, so it is nearly impossible to fake. It's the pretentiously-eccentric squiggly line that is easy to fake, as when the US government was faking Nazi signatures (typically use a squiggle that ends in "mann") for forging documents for infiltrating German police organizations. A surprise from a book to that effect was that the Gestapo was riddled with "enemy" agents.