MSNBC Live with Tamron Hall 12/14/15

Poll: Ted Cruz surges ahead of Donald Trump in Iowa

A new NBC News poll shows Ted Cruz gaining ground on Donald Trump nationally and pulling ahead of him in Iowa by 10 points. MSNBC Political Correspondent and Host Steve Kornacki takes a closer look at the big storyline shaping up ahead of the next GOP debate in Las Vegas. ... more Duration: {{video.duration.momentjs}}