"Police officers may enter and search a home without a warrant as long as one occupant consents, even if another resident has previously objected, the Supreme Court ruled Tuesday ... The 6-3 ruling ... gives authorities more leeway to search homes without obtaining a warrant, even when there is no emergency. The majority ... said police need not take the time to get a magistrate's approval before entering a home in such cases. But dissenters ... warned that the decision would erode protections against warrantless home searches."