U.S. Rep. Duncan Hunter plans to make his Republican presidential bid official at a Spartanburg, S.C. breakfast meeting Thursday. The 14-term conservative from California set up his presidential exploratory committee last week. Hunter has made no secret of his White House aspirations. He announced his intentions in October, becoming the first GOP candidate to declare a presidential run, and then began making stops in early primary states, including Iowa, New Hampshire and South Carolina. He is scheduled to return to New Hampshire on Monday to repeat his announcement. Little known outside of Congress and his San Diego district, Hunter can...