The coal industry has been rocked by the death of a former employee, who died after inhaling coal dust and choking on it.
The former worker, who is now 40, was a coal producer at a coal mine in New Hampshire.
He was a member of a family that owns a coal-burning facility.
His death is the latest in a string of occupational deaths in the industry.
Trump has said he wants to get rid of coal and he plans to build a wall along the U.S.-Mexico border.
His campaign has been plagued by accusations that it is lying about the death.
The Associated Press contributed to this report.