North Dakota Gov. Jack Dalrymple announced Monday that he will not run for re-election next year, blowing the gubernatorial race wide open and intensifying speculation over whether Democratic U.S. Sen. Heidi Heitkamp will seek the state’s highest office. The 66-year-old Dalrymple said in a news release that he and first lady Betsy Dalrymple plan to spend more time with family, including their five grandchildren. “It continues to be my great privilege to serve my state, service that includes 16 years as a state representative, 10 years as lieutenant governor and (the) last five-plus years as governor,” he said. “North Dakota...