No. I live in a vote-by-mail state. You can only cast a ballot after you have registered. It is validated against your own registration. So at the time of v

No. I live in a vote-by-mail state. You can only cast a ballot after you have registered. It is validated against your own registration. So at the time of voting, there is a hard limit on how much fraud is possible. To have an undocumented immigrant casting a vote, they'd have to register to vote and not get caught. Except the state absolutely does check the voter registration rolls to ensure only qualified citizens are on them. It is unnecessary to require ID every time you approach the ballot box. Invalid registrations are caught well before then.