Tackling the TikTok Threat

The House on Wednesday is expected to vote on a bill that would give popular social-media app TikTok an ultimatum: Break up with the Chinese Communist Party (CCP), or break up with the U.S. It didn’t need to come to this, but Beijing and TikTok’s Chinese-owner ByteDance left Washington with no choice.

Congress has spent years debating how to mitigate the national-security risks of TikTok’s Chinese ownership that have grown with the site’s popularity. About 150 million Americans use TikTok, and the app is a top source of news and...