How Trump shifted from banning TikTok to saving it

Trump joined TikTok last year and has grown his following to nearly 15 million users—crediting the app for helping him win over young voters.

During his first term as president, Donald Trump led the effort to ban TikTok, the hugely popular video-sharing site he said posed a threat to U.S. national security. But on the eve of his return to the White House, the president-elect is being hailed as the app’s savior.