How?

> In the remaining 14 states and D.C., voters can cast a ballot in person on Election Day without showing an ID document. These states have "non-documentary" ID requirements, meaning voters must verify their identity in other ways, such as by signing an affidavit or poll book, or by providing personal information. All states have procedures for challenging voter eligibility.

https://www.ncsl.org/elections-and-campaigns/voter-verificat...

The ID voting requirements are about keeping marginalized American citizens from voting (seniors, poor people who are bad at managing their documents, etc). Studies have been done of before/after ID requirements have been added in various states and there’s no indication that illegal aliens were taking advantage. Maybe a few anecdotes of people with a green card who were confused about the requirements - the illegally present usually try to stay as far from the government as they can.

It's also being helped by the fact that the right wing has a history of attempting to restrict votes, from mass purging of voter rolls without telling people, to closing voting sites such that voting in-person requires traveling farther and waiting longer in line, to making it illegal to hand out food or water to people at voting sites (in Georgia), to having gutted the VRA in 2013 with Shelby v Holder, which is often what allows them to do this in the first place. I have no faith voter ID laws wouldn't be used simply to further suppress votes in states where Republicans control the state legislature; and yes, often in racist ways, because non-white people tend to support the left more than white people, so suppressing their votes (often those of rural black or Hispanic voters) is beneficial to Republicans.