A law passed this year in Arizona, NB 2492, requires people who register to vote to attach proof of citizenship, such as a birth certificate or naturalization papers. On March 31, some Arizona voter advocacy groups filed a federal lawsuit against the new law. Living United for Change in Arizona v Hobbs, 2:22cv-519. The lead plaintiff is usually referred to by its acronym, LUCHA. The case is assigned to U.S. District Court Judge Susan R. Bolton. Here is the Complaint.
Arizona and Kansas jointly passed similar laws some years ago, and they were struck down because Article One gives Congress the right to pass election laws concerning congressional elections, and Congress had already mandated a federal voter registration form that does not require such documentation. Arizona is now trying to get around this past ruling by saying that voters who register to vote without the documentation can still be considered registered for congressional elections, but not presidential elections.