The U.S. Supreme Court has issued a 5-4 ruling that allows Arizona to enforce its proof of citizenship requirements for state voter registration forms, impacting over 41,000 voters who failed to provide such proof. However, the court declined to reinstate a related provision that would have barred these voters from participating in the presidential election or voting by mail if they did not provide proof of citizenship. This decision follows an emergency appeal from the Republican National Committee, aiming to uphold voting measures enacted after President Biden's narrow victory in Arizona. The ruling comes amidst ongoing legal battles regarding the state's voting laws, which have faced challenges in lower courts. Justices Thomas, Alito, and Gorsuch favored a broader reinstatement of the law, while Chief Justice Roberts and Justice Kavanaugh opted for a compromise, siding with the majority against some provisions. The case reflects a larger national debate over voting rights and election integrity.