Massey chief Don Blankenship said that he decided to finance the group, called And for the Sake of the Kids, because "without a change in the Supreme Court, businesses will continue to avoid West Virginia'' and the state's "job shortage'' would continue.
The group has already spent $2.4 million on advertising against McGraw.
"Over the years, I and the companies for which I worked have donated millions to West Virginia charities,'' he said. "However, I decided this summer that the most productive donation I could make to my fellow West Virginians was to help defeat Warren McGraw.''
Massey has about 3,000 employees in West Virginia.