WASHINGTON, DC - JUNE 22: Supporters of House Democrats taking part in a sit-in on the House Chamber shout encouragement from outside the U.S. Capitol on June 22, 2016 in Washington, DC. Led by civil rights icon Rep. John Lewis (D-GA) Democrats have maintained control of the House chamber since this morning demanding a vote on gun control legislation. (Photo by Pete Marovich/Getty Images) *** BESTPIX ***

WASHINGTON, DC - JUNE 22: Surrounded by security and staffers, Speaker of the House, Paul Ryan (R-WI) makes his way to the House floor to call for a vote in an effort to break up a sit-in by democrats on June 22, 2016 in Washington, DC. Led by civil rights icon, Rep. John Lewis (D-GA), democrats, took control of the House chamber Wednesday morning demanding a vote on gun control legislation. (Photo by Pete Marovich/Getty Images)

WASHINGTON, DC - JUNE 22: Surrounded by security and staffers, Speaker of the House Paul Ryan (R-WI) makes his way to the House floor to call for a vote in an effort to break up a sit-in by Democrats on June 22, 2016 in Washington, DC. Led by civil rights icon, Rep. John Lewis (D-GA), democrats, took control of the House chamber Wednesday morning demanding a vote on gun control legislation. (Photo by Pete Marovich/Getty Images)

WASHINGTON, DC - JUNE 22: U.S. Rep. John Lewis (D-GA) (2nd L) walks down the steps of the Capitol after House Republicans have forced votes as House Democrats stages a sit-in on the House floor June 22, 2016 on Capitol Hill in Washington, DC. House Democrats are staging a sit-in on the House floor to demand Speaker Rep. 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)

WASHINGTON, DC - JUNE 22: U.S. Speaker of the House Rep. Paul Ryan (R-WI) arrives for votes as House Democrats stages a sit-in on the House floor June 22, 2016 on Capitol Hill in Washington, DC. House Democrats are staging a sit-in on the House floor to demand Speaker Ryan 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)

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)

WASHINGTON, DC - JUNE 22: U.S. Speaker of the House Rep. Paul Ryan (R-WI) (C) arrives for votes as House Democrats stages a sit-in on the House floor June 22, 2016 on Capitol Hill in Washington, DC. House Democrats are staging a sit-in on the House floor to demand Speaker Ryan 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)

WASHINGTON, DC - JUNE 22: U.S. Rep. John Lewis (D-GA) (L) speaks to members of the media outside the Capitol after House Republicans have forced votes as House Democrats stages a sit-in on the House floor June 22, 2016 on Capitol Hill in Washington, DC. House Democrats are staging a sit-in on the House floor to demand Speaker Rep. 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)