Since the 2016 elections, politicians, journalists, and many others have raised the alarm about “foreign election influence” and “disinformation,” demanding greater “content moderation” by social media platforms. It is too easy, they argued, for foreign and malign actors to quickly “go viral” at low cost, leaving the good guys unable to correct bad information. We must become more “resilient” to disinformation. It’s now clear that all of that rhetoric was cover for a sweeping censorship effort by the federal government and government contractors. Since December, a small but growing group of journalists, analysts, and researchers have documented the rise of...