"But in Congress, the debate seems to have been suspended."
The House passed a bill requiring enhanced background checks in February. Last month three gun control bills came out of committee and will probably pass and be sent to the Senate.
The problem is simply that the Republican leadership in the Senate refuses to put these bills to a vote. Mitch McConnell says he won't put anything to a vote that the POTUS won't sign. The truth is he doesn't want Republican senators going on record against gun-control legislation that the public overwhelming supports (89 percent on background checks).