If I was DNC chair, I would make getting back WV a top priority. Make it very clear that anti-coal democrats are in the wrong, in fact, kick them out of the party if they won't change their views. Make being pro-coal one of the first things the democratic platform lists, and stress its importance. Apologize over and over again in TV ads for your pure stupidity, recklessness, and destruction of jobs in being anti-coal. Say that you are thankful for the punishment the state gave the democratic party, and have learned from it.
Well luckily you're not the DNC chair.
The fewer votes the Democratic Party gets from that garbage state, the better.