WASHINGTON, DC - JUNE 22: Charles Bolden, staff assistant of Rep. Robin Kelly (D-IL), holds a poster with pictures of gun violence victims from Chicago as he walks towards the House Chamber June 22, 2016 on Capitol Hill in Washington, DC. House Democrats are staging a sit-in on the House floor to demand Speaker Paul Ryan (R-WI) not to recess the House without voting on legislation including the bipartisan 'No Fly, No Buy' legislation and a universal background check bill. (Photo by Alex Wong/Getty Images)