Poll: Rubio and Bush fighting for third in South Carolina
Ted Cruz is gaining on Donald Trump in South Carolina, a new poll shows, and Jeb Bush is in contention with Marco Rubio.
Trump leads Cruz by 5 points, 28 percent to Cruz's 23 percent, according to a new NBC News/Wall Street Journal/Marist poll. Trump had been up 16 points a month ago.
Rubio is third with 15 percent and Bush with 13 percent.