An economic impact study finds an expansion of the Ho-Chunk casino in Shawano County could draw 37-million dollars a year from other American Indian tribes that own casinos in Wisconsin. The Stockbridge-Munsee Band commissioned the study. It stands to lose about 22-million dollars or 37 percent of its gambling revenue annually at its North Star Mohican Casino and Resort in Bowler. North Star is about 17 miles away from the Ho-Chunk’s Wittenberg casino, which has broken ground on a 33-million-dollar expansion. The study by a Chicago firm finds the gambling market completely saturated in Wisconsin, particularly to the north. Four other tribes stand to lose nearly 15-million dollars at their nine casinos. Those tribes include the Potawatomi, Oneida, Chippewa and Menominee.