WASHINGTON, DC - SEPTEMBER 08: Sen. Sherrod Brown (D-OH) addresses thousands of 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 Miners Protection Act and honor a 1947 promise to provide for the pension and healthcare benefits of retired miners. (Photo by Chip Somodevilla/Getty Images)