Obama is not popular with the coal industry.
Check it out:

Unions are targeting the coal industry and joining a prominent liberal think tank in calling for the federal government to force coal companies to pay more royalties for minerals extracted on federal lands.

The Center for American Progress (CAP) and AFL-CIO President Richard Trumka are pushing for the government to raise the royalty rates paid by coal companies mining in the Western U.S., saying they have an unfair advantage over eastern coal mines. In other words, they argue raising costs for western mines will level the playing field with eastern mines — where it’s more expensive to extract coal.