WASHINGTON, DC - SEPTEMBER 08: Miners Protection Act sponsor Sen. Joe Manchin (D-WV) 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. About 100 protesters from the UMWA were arrested for blocking traffic on Pennslylvania Avenue following the rally. 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)

WASHINGTON, DC - SEPTEMBER 08: Sen. Shelley Moore Capito (R-WV) is welcomed to the stage by United Mine Workers of America President Cecil Roberts as the union gathered 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)

WASHINGTON, DC - SEPTEMBER 08: Thousands of members and supporters of the United Mine Workers of America gather to call on Congress to pass the Miners Proteciton Act during a rally on the National Mall September 8, 2016 in Washington, DC. The union and its supporters in Congress say the federal government should honor a 1947 promise to provide for the pension and healthcare benefits of retired miners. About 100 protesters from the UMWA were arrested for blocking traffic on Pennslylvania Avenue following the rally. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 08: Thousands of members and supporters of the United Miner Workers of America gather to call on Congress to pass the Miners Proteciton Act during a rally on the National Mall September 8, 2016 in Washington, DC. About 100 protesters from the UMWA were arrested for blocking traffic on Pennslylvania Avenue following the rally. The union and its supporters in Congress say the federal government should honor a 1947 promise to provide for the pension and healthcare benefits of retired miners. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 08: U.S. Senate Minority Leader Sen. Harry Reid (D-NV) (L) arrives for a press event on the House East Front Steps of the Capitol September 8, 2016 in Washington, DC. Congressional Democrats urge the Republicans to "do your job!" (Photo by Alex Wong/Getty Images)

WASHINGTON, DC - SEPTEMBER 08: Juanita (L) and Manuel Ojeda of Logan County, West Virginia, hold signs in support of the United Miner Workers of America and in opposition to Senate Majority Leader Mitch McConnell (R-KY) during a UMWA rally on the National Mall September 8, 2016 in Washington, DC. About 100 members of the UMWA were arrested for blocking traffic on Pennslylvania Avenue following the rally to call on Congress to pass the Miners Protection Act. The union and its supporters in Congress say the federal government should honor a 1947 promise to provide for the pension and healthcare benefits of retired miners. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 08: Miners Protection Act sponsor Sen. Joe Manchin (D-WV) 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. About 100 protesters from the UMWA were arrested for blocking traffic on Pennslylvania Avenue following the rally. 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)

WASHINGTON, DC - SEPTEMBER 08: Thousands of members of the United Miner Workers of America gather to call on Congress to pass the Miners Proteciton Act during a rally on the National Mall September 8, 2016 in Washington, DC. About 100 protesters from the UMWA were arrested for blocking traffic on Pennslylvania Avenue following the rally. The union and its supporters in Congress say the federal government should honor a 1947 promise to provide for the pension and healthcare benefits of retired miners. (Photo by Chip Somodevilla/Getty Images)