Live Video: Obama nominates DHS ChiefPresident Obama names former Defense Department general counsel Jeh Johnson as secretary of Homeland Security.Jeh Johnson at the Dirksen Senate Office Building on Capitol Hill in Washington, DC.Oct. 18, 2013, 4:50 PM UTC / Updated Oct. 18, 2013, 5:51 PM UTCBy MSNBC staff, MSNBC staff