Good point on coal jobs.  They are unlikely to come back.  My reference point are the words of Sen Mitch McConnell (R - KY), “Whether that immediately brings business back is hard to tell because it’s a private sector activity.”  http://www.kentucky.com/news/politics-government/article114197923.html

If you are really interested in bringing back the coal jobs, the most straightforward solution is to ban all fracking immediately.  This will drive up the price of natural gas and could make coal economically feasible.