BILLINGS, Mont. (AP) — Democratic lawmakers are calling for an investigation into U.S. Interior Secretary Ryan Zinke's involvement in a land deal with the chairman of an energy services company that does business with the agency. A foundation created by Zinke has been dealing with a company co-owned by Halliburton Chairman David Lesar on a commercial development in Whitefish, Montana — Zinke's hometown. Democrats led by Rep.