Guys and gals, this isn't all that complicated.
Yes, it's probably a voter registration problem. But it opens the door wide for voter fraud. If you can't see that....well, if you can't see that, let me explain.
Let's say I want to vote twice. I go to my precinct and cast my vote (some people don't think I should have to go to any specific precinct, but that's another subject). Then, having discovered that Joe Blow in another precinct has died or moved to Omaha, I go to his precinct, say I'm Joe Blow, and vote again. If I had to show an ID, that wouldn't be possible unless I actually had a fake ID, which is highly unlikely.
I have told this story before, but I'll tell it again......a few years ago, when I was still working, I was one of several employees who attended a "meet and greet" type affair in Decorah. We had these things in outlying communities fairly frequently. Gave us a chance to meet readers, answer questions about the paper, get suggestions and criticisms, that kind of thing.
In this case, it was shortly after an election and we had carried a post-election story about voter turnout. The supervisor of elections complained -- in a very nice way -- that the statistics made them look worse than they really were because there were thousands -- her word -- of people listed as registered voters who no longer lived there. Mostly these were students and faculty from Luther who had registered while living there, and remained on the rolls even though they had long since departed.
This wasn't an attempt at fraud, of course. But it created a tremendous potential for fraud -- one that could have simply and effectively been eliminated by requiring ID at the polls.
Voter ID aside, the registration lists need to be monitored and cleansed regularly. Unfortunately, when somebody tries to do that, they get accused of trying to deprive people of their franchise. And in fairness, that sometimes happens. But again, requiring ID would address that problem without disenfranchising anyone.
The crucial factor, as both common sense and the courts say, is that the ID must be easy to obtain and free.