The Democrats in the House of Representatives do not have the votes to pass a gun control bill. And rather propose tougher security measures--such as keeping Syrian economic migrants out of America until we can ascertain they are not terrorists, they are holding a sit-in on the floor of the lower chamber.
That's how government doesn't work in Third World banana republics.
If the Dems want to pass gun control, they can win control of the House in November. All 435 seats are up for grabs. That's how adults do things.