More than 2,500 people are expected to attend a rally in support of the presumptive Republican presidential nominee at the Century Mine, about four miles north of Beallsville. Beallsville is in Monroe County, while the mine is just over the county line in Belmont County. The mine is owned by Murray Energy Corp., whose CEO, Robert Murray, plans to bus workers and their families to the event.

Romney will speak to the workers about his "contrasting approach" to energy compared to Obama, said Chris Maloney, spokesman for Romney's Ohio campaign.

The event is not open to the public.

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