How do you know they are not Democrat voters?
Because this is my home area and they are my friends and family.
See the map. Click it if you like to see the source. The deeper the blue (this map has it right), the less the percent of votes for ObaMao. Notice how deep blue SW Virginia is.
This, of course, does not guarantee that a handful of fools in this group might have voted for him. But it does show how coal country feels about him.