Exclusive — Sec. Markwayne Mullin: Democrats Wanting to Abolish DHS 'Didn't Understand What Happened’ on 9/11

Department of Homeland Security (DHS) Secretary Markwayne Mullin said some Democrats calling for the department’s elimination did not understand what happened 25 years ago or why DHS was created as he outlined the department's responsibilities during a Breitbart News discussion on border security, p