WASHINGTON, DC - SEPTEMBER 08: Miners Protection Act sponsor Sen. Joe Manchin (D-WV) greets members of the United Miner Workers of America as they gather for a rally on the National Mall September 8, 2016 in Washington, DC. The union and its supporters in Congress say the federal government should pass the act and honor a 1947 promise to provide for the pension and healthcare benefits of retired miners. (Photo by Chip Somodevilla/Getty Images)