An appeals court upheld Arizona's voter identification law. The National Voter Registration Act requires voters to show identification before they can cast a ballot.

Critics argued the law hurts Latino voters. But the 9th Circuit Court of Appeals ruled there's no proof it gives Latinos fewer opportunities to vote.

However, the 12-member panel struck down a provision requiring voters to show proof of citizenship.

Nina Perales, vice president of litigation for MALDEF, the group that argued the case in court, was pleased with the ruling. 

"Today's ruling vindicates all the U.S. citizens who were improperly rejected for voter registration in Arizona," she said. "Arizona may no longer flaunt federal law in voter registration, particularly in a manner that discriminates against newly naturalized citizens."

The state's attorney general believes the issue will ultimately be decided by the U.S. Supreme Court.