A customer purchases a gun at Freddie Bear Sports on April 08, 2021 in Tinley Park, Illinois. (Photo by Scott Olson/Getty Images) Senate bargainers announced a bipartisan framework Sunday responding to last month’s mass shootings, a modest breakthrough offering measured gun curbs and bolstered efforts to improve school safety and mental health programs.The proposal falls far short of tougher steps long sought by President Joe Biden and many Democrats.