U.S. Senator John Thune of South Dakota, who was elected majority leader of the U.S. Senate and will lead the Senate Republican caucus in the next term, won a three-way race in a closed-door vote on Wednesday to succeed Minority Leader Mitch McConnell. In the Senate, given the Republican majority of 53 seats, Thune will have some room to maneuver in the Senate. Thune, 63, has not yet committed to the caucus leader position...