Former Idaho Gov. and U.S. Interior Secretary Dirk Kempthorne has died at age 74, his family said in a written statement Saturday. Kempthorne died Friday evening in Boise, the statement said. No cause was given. He had been diagnosed with colon cancer last year. “Beyond his public service, he was a devoted husband, father, and grandfather whose greatest joy came from time spent with family and the people he met along the way,” his family said. “He had a rare gift for truly seeing others—remembering names, stories, and the small details that made each person feel known and valued.” Kempthorne, a moderate Republican, was elected mayor of Boise in 1985 at age 34, and he was credited with revitalizing the downtown by securing an agreement to build a convention center and promoting other development. He served seven years before winning the U.S. Senate seat vacated by Sen. Steve Symms in 1992....