WASHINGTON, DC - SEPTEMBER 08: United Mine Workers of America President Cecil Roberts (in blue) joins about 100 members of the UMWA as they block traffic on Pennsylvania Avenue near the U.S. Capitol following a rally on the National Mall September 8, 2016 in Washington, DC. The union and its supporters say Congress should pass the Miners Protection Act and honor a 1947 federal government promise to provide for the pension and healthcare benefits of retired miners. (Photo by Chip Somodevilla/Getty Images)