WASHINGTON, DC - JUNE 22: U.S. Rep. John Lewis (D-GA) (R) 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)

WASHINGTON, DC - JUNE 22: U.S. Rep. John Lewis (D-GA) speaks to gun control activists who gather 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)

WASHINGTON, DC - JUNE 22: Civil rights icon Rep. John Lewis (D-GA) speaks to supporters of House Democrats taking part in a sit-in on the House Chamber outside the U.S. Capitol on June 22, 2016 in Washington, DC. Led by 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)

WASHINGTON, DC - JUNE 22: Civil rights icon Rep. John Lewis (D-GA) makes his way back to the Capitol after speaking to supporters of House Democrats taking part in a sit-in on the House Chamber outside the U.S. Capitol on June 22, 2016 in Washington, DC. Led by 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)

WASHINGTON, DC - JUNE 22: Civil rights icon Rep. John Lewis (D-GA) speaks to reporters outside the U.S. Capitol on June 22, 2016 in Washington, DC. Led by 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)

WASHINGTON, DC - JUNE 22: Civil rights icon Rep. John Lewis (D-GA) speaks to supporters of House Democrats taking part in a sit-in on the House Chamber outside the U.S. Capitol on June 22, 2016 in Washington, DC. Led by 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)

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)

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)