With a plunge in energy prices worldwide and increased competition from natural gas drilling, the coal industry has taken a huge hit in recent years, with more than 30,000 American coal workers losing their jobs since 2011. The third largest coal producing county in the country, Greene County, Pennsylvania, is reeling from the layoff of hundreds of unionized coal workers last year. Will antipathy with the Obama Administration sway mine workers away from Hillary Clinton? Could the predominantly white, working-class voters in coal country be the key to swinging the state in favor of Republicans in November for the first time since 1998? NewsHour Special Correspondent Chris Bury reports.