It was a long shot. A 25-hour sit-in by Democrats and procedural vote in the Senate brought gun control into sharp focus last week. Majority Republicans quashed debate, but it will certainly continue on the campaign trail now that 80 percent of Americans support at least preventing terror suspects — like Orlando shooter Omar Mateen — from buying firearms. Eight GOP senators even supported such a ban, but the measure stalled. House Speaker Paul Ryan called the drama a “publicity stunt,” but gun control backers are locked and loaded for November.