A coal miner cheers as former Massachusetts Gov. Mitt Romney, the presumptive Republican presidential nominee, speaks during an event at the American Energy Corporation in Beallsville, Ohio, on Tuesday. The United Mine Workers of America has yet to make a decision about endorsing President Obama. (Associated Press)

A coal miner cheers as former Massachusetts Gov. Mitt Romney, the presumptive Republican presidential nominee, speaks during an event at the American Energy Corporation in Beallsville, Ohio, on Tuesday. The United Mine Workers of America has yet to make a decision about endorsing President Obama. (Associated Press)