By a 5-4 vote that split the conservative and liberal justices, the court rejected arguments in a case from Ohio that the practice violates a federal law intended to increase the ranks of registered voters. A handful of other states also use voters' inactivity to trigger a process that could lead to their removal from the voting rolls.
Justice Samuel Alito said for the court that Ohio is complying with the 1993 National Voter Registration Act. He was joined by his four conservative colleagues.