Mealey's (March 27, 2020, 9:09 AM EDT) -- WASHINGTON, D.C. — Tribal and environmental groups on March 24 asked the U.S. Supreme Court to vacate dismissal of their challenge to the federal government’s approval of coal-mining activities by an Indian company on Indian land based on tribal sovereign immunity, saying the ruling creates a conflict among courts that handle most of the Native American law disputes in the country (Diné Citizens Against Ruining Our Environment, et al. v. Bureau of Indian Affairs, et al., No. 19-1166, U.S. Sup.)....