WASHINGTON — Prince William County Board Chair Corey Stewart, a bombastic supporter of President Donald Trump, has won the Virginia GOP primary in the U.S. Senate race in a narrow victory over Virginia Del. Nick Freitas. The hard-right firebrand now faces Democratic Sen. Tim Kaine, the Democrats’ 2016 vice presidential nominee and former Virginia governor, who is seeking a second term. Speaking to his supporters gathered Tuesday night in Warrenton, Virginia, Freitas conceded the race and pledged to support Stewart in the general election. The race between Stewart and Freitas remained close throughout the night as ballots were counted. The...