Two days after Chris Christie’s reelection rout in New Jersey and his sweeping speech that left little room for guessing about what he plans to do next, the governor was greeted Thursday with a Time magazine cover calling him the “elephant in the room.” The suggestive language about the New Jersey governor, whose weight struggles have been chronicled and analyzed at length, was obvious. “Dr. Hitchcock?” asked one GOP strategist in a conversation with a reporter, referring to the jowly silhouette of the famous director. … Christie is being heralded by donors and elites as a potential GOP savior—their early...