The Briefing 01/08/16

Infighting grows among GOP candidates

Just weeks away from the Iowa and New Hampshire caucuses, Donald Trump is gliding through the polls as the other Republican presidential candidates continue their infighting. NBC’s Mark Murray, Carrie Dann, and Leigh Ann Caldwell discuss the attacks faced by candidates like Marco Rubio and Chris Christie, and what it means for Republicans for the rest of the election year. ... more Duration: {{video.duration.momentjs}}