U.S. Congressional Democrats have been demanding that the House of Representatives votes on gun-control legislation. The Democratic Party lawmakers began the protest on Wednesday. Congressman John Lewis of Georgia asked House Democrats to join him in a sit-in on the House floor to force a vote. Lewis was active in America’s civil rights movement, and took part in non-violent sit-in protests half a century ago. The protest on the House floor continued through the night and into Thursday afternoon. The lawmakers held up pieces of paper with the names of gun violence victims. They spoke about the country’s need for stronger gun control measures. Republicans in the U.S. Senate rejected four proposed gun measures earlier this week. The four bills were offered after the deadliest mass shooting in American history. Forty-nine people died in the attack at a gay nightclub in Orlando, Florida.