Trump declined to say whether he supported any of the gun legislation backed by Democrats in the U.S. House of Representatives.

Donald Trump: "The gun doesn't pull the trigger. They pull the trigger. So we have to look very seriously at mental illness."

In the wake of the Las Vegas shooting, lawmakers from both parties pushed to ban bump stocks, the device that allowed the shooter’s semi-automatic rifles to mimic the rapid fire of machine guns. Those efforts soon fizzled.