From the article:
"Murray officials announced the planned closure in May, citing the facility reaching the end of its “productive life” because there are no longer any minerals to extract in an economical manner."
and
"“These reductions are a result of depleted coal reserves and reduced coal markets, as caused by the ongoing destruction of the U.S. coal industry by President Barack Obama and his political supporters and regulatory agencies, and the increased utilization of natural gas to generate electricity,” the statement reads, in part."
Hard to tell from the statement above whether the mine in question has actually played itself out, or what.
Perhaps Murray just doesn't want to keep this one open any longer, and is saying that "there are no longer any minerals to extract in an economical manner," when the mine still has coal left in it, but would require more man-hour per ton to extract.
In other words, the mine might still be capable of paying its way and earning a profit, just not a "large enough" profit any longer for the owners.
If the coal in this one has indeed run out, wouldn't make any difference who gets elected.
Just sayin'...