With all the action on gun control on a state level, what’s holding up Congress?

Connecticut and Maryland added their names to the growing list of states moving forward with strict new gun laws in the wake of Newtown. But nearly 4 months after the shooting at Sandy Hook elementary, why is gun control stalled in Congress? Rep. Peter King, R-N.Y., whose state passed one of the nation’s first new gun control laws after Newtown, discusses.April 4, 2013