Well, you can't just require photo ID, but that is a start.
Second step is a “row” of simple blocks across the bottom of the plastic ID card: At each election, when the single person votes, his or her ID card is punched out by the register at the polls. Once the “block” is punched, you can't vote again.
(Yes, the democrats CAN and WILL continue cheating - as pointed out above, much of today's black culture does not accept the “rule of law” as applicable to them, their culture, nor their own behavior. If nothing else, look at the felon rate by race and illegal alien percentages.) But at least it is a start, and it can become a beginning to restraint of illegal voting.
Frankly, nothing will work until the voter register is checked automatically against the list of people who have already voted, and an audible alarm and photo is taken as soon as a given photo-ID is tried to be used twice. What? You think you can trust a democrat poll watcher to prevent fraud?
Thanks Robert A. Cook, PE.