Republicans have taken control of the U.S. Senate and are fighting to keep their majority in the U.S. House, which would produce a full sweep of GOP power in Congress alongside

Senate Republicans have not officially selected their next leader to follow Sen. Mitch McConnell, who is expected to step down as the longest-serving Leader. And it’s not clear how the newly elected Republicans can sync with the party as newcomers in an environment that rewards longevity and loyalty.