The Trump administration is unflinching in its misbegotten campaign to protect the coal industry from what has become an obvious and inevitable decline. Eight months in, the administration has already killed, or is in the process of killing, rules that would prevent the dumping of coal mining wastes in streams, impose a temporary moratorium on new mine leases in the West, and reduce greenhouse gas emissions from coal-fired power plants — one of President Barack Obama’s most important efforts to resist climate change. All of this to prop up an industry whose workers would be best served not by false promises of new mining jobs, but by aggressive programs to retrain them for a changing economy...