Taiwan Holds Election as World Watches

TAIPEI—Taiwanese voters headed to the polls on Saturday to choose a new president in an unpredictable three-way race being closely watched in Washington, Beijing and other capitals around the world.

President Tsai Ing-wen, a frequent target of Beijing’s ire, is due to step down in May because of term limits after eight years in power. Whoever takes on the top job will face stiff challenges, both domestically and internationally, amid geopolitical uncertainty.