MSNBC Live with Tamron Hall 12/07/15

Obama: ‘We will overcome’ ISIS threat

Following President Obama’s Oval Office address on the threat of ISIS, Homeland Security Secretary Jeh Johnson announced the administration will roll out a new terror threat warning system in coming days. Former Vermont Governor and MSNBC Contributor Howard Dean and former South Carolina GOP Chairman Katon Dawson join Frances Rivera on MSNBC. ... more Duration: {{video.duration.momentjs}}