Morning Joe 12/18/15

Trump triples his nearest opponent in poll

Top Talkers: In the first national poll conducted after this week's GOP debate, Donald Trump is still in first place. His numbers triple the strength of his nearest competitor, Ben Carson, who stands at 12 percent. At a Mesa, Arizona rally, Mark Halperin interviews Trump backers, who show the resiliency of Trump's support. ... more Duration: {{video.duration.momentjs}}