Key Senate race: Republican Kevin Cramer defeats Democratic incumbent Heidi Heitkamp in North Dakota. Kevin Cramer, a House lawmaker, had strong support from President Donald Trump in a state that Trump won by 36 percentage points. Heidi Heitkamp had tried to focus on local issues and her moderate record but was hurt by the nationalization of the race through the confirmation of Brett Kavanaugh to the Supreme Court. Ref. USAToday.