FILE - In this March 11, 2018, file photo, Cecil Roberts, president of United Mine Workers of America, speaks at the Greene County Fairgrounds in Waynesburg, Pa. Roberts says plans by Democratic presidential candidates to address climate change must account for thousands of coal workers whose jobs are at risk because of mine closures and competition from cheaper natural gas. (Antonella Crescimbeni/Pittsburgh Post-Gazette via AP)
Featured Photo Galleries
