Georgia's top court is considering the legality of the state's oft-challenged law that requires voters to show photo identification before they cast their ballots.

The Georgia Supreme Court is set to hear arguments Tuesday on a new type of legal challenge brought by the law's opponents.

Earlier efforts to block the law were filed in federal court and contended it violated voters' rights under the U.S. Constitution. But the latest case brought by the Democratic Party of Georgia claims the requirement violates the Georgia Constitution.

Critics have long tried to block the law, claiming it places an undue burden on poor, disabled people and minorities. But supporters say it's needed to combat voter fraud.