Conservative U.S. Supreme Court justices were joined by liberal Stephen Breyer on Wednesday in signaling sympathy toward Ohio’s policy of purging infrequent voters from registration rolls — a practice critics say disenfranchises thousands of people — in a pivotal voting rights case. The nine justices heard about an hour of arguments in Republican-governed Ohio’s appeal of a lower court ruling that found that the policy violated a federal law aimed at making it easier for Americans to register to vote. Indicating he potentially could join the court’s conservatives in a ruling upholding Ohio’s policy as lawful, Breyer noted that a state needs tools to clean up its voter rolls.