 Speaker Johnson adds that Republicans won't abandon their core principles, but that all congressional leaders in both parties should adopt a more civil tone in the days ahead. President Trump selects Senator J.D. Vance of Ohio to be his running mate. Waiting until the first day of the Republican National Convention here in Wisconsin, the former president announced Vance as his vice presidential pick. He's a 39-year-old lawmaker who's relatively new to national politics.