In this combination of photos, President Joe Biden speaks on Aug. 10, 2023, in Salt Lake City, left, and former President Donald Trump speaks on July 8, 2023, in Las Vegas. More than 50 countries that together house half the world’s population have national elections expected in 2024. The year looks set to test even the most robust democracies and to strengthen the hands of leaders with authoritarian leanings. From Taiwan and Russia to India and South Africa, the bumper crop of contests has huge implications globally. (AP Photo, File)