GILBERT, S.C. — Mitt Romney and a top surrogate called for Newt Gingrich, Romney's chief rival for the Republican presidential nomination, to release the House Ethics Committee report that led to a reprimand of Gingrich and a $300,000 fine. After Romney was pressed on his tax returns, Gov. Nikki Haley (R-S.C.) stepped in and interrupted Romney. "The people of South Carolina are not talking about tax returns. They're not. They're talking about jobs, spending and the economy," she said before taking a shot at Gingrich, who is neck and neck with Romney in recent polls of South Carolina. "In all...