Nikki Haley has lost big to Donald Trump in both Iowa and New Hampshire, and the coming states aren’t looking any better for her. But at a local BBQ joint here Thursday, Haley railed against the “political elite pushing us to name a nominee when only two states have voted.” “Why would we stop now?” asked Haley, the former governor of South Carolina and ambassador to the United Nations. The crowd was with her. “Don’t stop!” her supporters shouted. “Don’t stop! Don’t stop!” The message belied the realities on the ground — realities that haven’t escaped her own backers. Haley...