"The Supreme Court on Monday struck down an Arizona law that requires people to submit proof of citizenship when they register to vote.
The vote was 7-2. Justice Antonin Scalia, writing for the majority, said that a 1993 federal law known as the Motor Voter Act takes precedence over the Arizona law because of its requirement that states “accept and use” the federal voter registration form.
Justices Clarence Thomas and Samuel Alito, two members of the court’s conservative wing, dissented.
Only a handful of states have similar laws, which the states say are meant to reduce voter fraud. Civil rights groups said the Arizona law was an effort to discourage voting by legal immigrants, and they worried that more states would have followed if the Supreme Court had upheld it.
Groups opposed to the Arizona law said that the court had blocked an attempt at voter suppression."