MTP Daily 09/07/16

Corker: Trump 'Evolving' on National Security

Sen. Bob Corker (R-TN) says Donald Trump is "evolving in his knowledge" of national security issues but will not say if he's "comfortable" with Trump as commander-in-chief. Corker talks to Chuck Todd ahead of NBC's Commander-in-Chief Forum. ... more Duration: {{video.duration.momentjs}}