Arizona Proposition 200 (2004)
Arizona voters passed Proposition 200, requiring proof of citizenship to register to vote. The measure was enforced for state elections but frozen for federal elections after the U.S. Supreme Court ruled in Arizona v. Inter Tribal Council of Arizona (2013) that states could not add requirements beyond the federal voter registration form.
The law took effect for state elections but was blocked for federal elections pending litigation.
The 2013 ruling established that states cannot impose additional requirements on the federal voter registration form, a precedent that constrains citizenship verification efforts.
The Michigan measure faces the same tension: states can require citizenship to vote in state elections, but federal law limits how they verify it for federal elections.
