U.S. House Speaker Paul Ryan, a Republican from Wisconsin, speaks during a news conference on Capitol Hill in Washington, D.C., U.S., on Thursday, June 23, 2016. Ryan said that the day-long Democratic sit-in over gun curbs wouldn't change how Republicans run the House, dismissing it as a "publicity stunt" that risks setting a dangerous precedent for U.S. democracy. Photographer: Andrew Harrer/Bloomberg via Getty Images