The TikTok controversy in Congress is classic Washington theater, full of sound and fury, yet in the end signifying little. Democrats and Republicans seem broadly united in their belief that…something’s off with TikTok, the hit social-media app with 150 million American users. They might even be right about that. But fulmination is about as far as Congress will go, because there aren’t enough senators and representatives willing to risk the consequences of action on something they know little about. The issue is whether TikTok, owned by Chinese company ByteDance, could remit data on American users to China’s communist government for...