American Indians that share reservation face off in lawsuit 

BILLINGS, Mont. (AP) — Wyoming’s Northern Arapaho Tribe has sued the leaders of the Eastern Shoshone Tribe, escalating a long-running political dispute between two American Indian tribes that share a reservation.

The lawsuit was filed Monday in U.S. District Court in Montana. It claims Eastern Shoshone leaders improperly approved mineral leases and made hiring decisions without consulting the Nort...