They're part of a wave of new laws enacted by Republican-controlled legislatures this year. Supporters say the rules are needed to ensure honest elections.
But Democrats say it's part of a concerted GOP campaign to suppress the vote. They say minorities, students, the poor and disabled — those most likely to vote Democratic — will be hurt the most.
Seven states so far this year have enacted new laws requiring voters to show photo ID at the polls. Ohio and Pennsylvania are considering similar requirements, and several other states already have them on the books.
Other states have placed restrictions on voter registration drives, imposed new requirements for voters to show proof of citizenship, or reduced the amount of time for early voting.
