DHS Chief: Gun Control is a Homeland Security Issue

DHS Secretary Jeh Johnson made the rounds today stating gun control is a Homeland Security issue. When did DHS, an arm of the Executive Branch, take over the role of Congress aka Legislative Branch? It’s pretty obvious anything DHS proposes is coming from the Oval Office. If Congress remains silent as DHS takes a legislative role infringing on citizens rights we are in a lot of trouble as they will be rendered completely irrelevant ceding more power to the Oval Office!