If you checked TikTok on Saturday evening and got a foreboding message, it's because the app is no longer usable in the United States. The government's TikTok ban went into effect late Saturday night, ...

Mr. Marche is the author, most recently, of “The Next Civil War.” He wrote from Toronto, where he lives. You may not think of Chubby Checker’s “Let’s Twist Again” as an incendiary political anthem, or ...