Of these states, six have Democratic trifectas, 23 have Republican trifectas, and seven have divided governments. There are currently 14 states that do not require identification at the polls outside of what is required by federal law. Of these 14 states, 10 have Democratic trifectas, and four have a divided government.
How do they know that you haven’t voted already or prevent someone else from voting in your place?
My state (republican trifecta) requires a signature at the polling place that matches your voter registration card or photo ID card. I assume they can audit these if there’s a question.