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)

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: 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)

WASHINGTON, DC - SEPTEMBER 08: Thousands of members of the United Miner Workers of America, including Nathan Cramer (R) of Jasper, Alabama, 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: 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)

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: U.S. Vice President Joseph Biden, House Minority Leader Rep. Nancy Pelosi (D-CA) and other Senate and House Democrats walk down the House East Front Steps of the Capitol to attend a press event 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: U.S. Vice President Joseph Biden speaks as Senate Minority Leader Sen. Harry Reid (D-NV), House Minority Leader Rep. Nancy Pelosi (D-CA) and other Senate and House Democrats listen during 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)