South Carolina and Nevada Takeaways: Messages Get Results

Donald J. Trump came into South Carolina with momentum after a big win in New Hampshire — and he seemed to try his best to undercut himself. He attacked George W. Bush, a popular figure in the state, for his handling of terrorism and the Iraq war. He repeatedly picked fights with the well-liked Gov. Nikki R. Haley. He held forth on national television about his friendships with Howard Stern and Michael Jackson.