They just may. A good number of the rank-and-file membership in the United Mine Workers voted for Romney
and the UMW did not endorse Obama’s re-election. In fact it remained neutral in the 2012 presidential election.
Since they voted for him in 2008 despite having no excuse for not knowing that he’d publicly called for the end of coal mining, they didn’t have any complaint coming then, and don’t have one now.