U.S. wildlife officials plan to lift protections for gray wolves across the Lower 48 states, a move certain to re-ignite the legal battle over a predator that's rebounding in some regions and running into conflicts with farmers and ranchers. Acting Interior Secretary David Bernhardt was expected to announce the proposal during a Wednesday speech before a wildlife conference in Denver, U.S. Fish and Wildlife Spokesman Gavin Shire said.The decision to lift protections is based on gray wolves successfully recovering from widespread extermination last century, Shire said. He said further details would be made public during a formal announcement planned in coming days.