“It’s the same thing happening on both sides, and I’ve been amazed at how much this is coordinating our reality,” said the writer Thomas Chatterton Williams, who was for a time a member of a group chat with Andreessen. “If you weren’t in the business at all, you’d think everyone was arriving at conclusions independently — and [they’re] not. It’s a small group of people who talk to each other and overlap between politics and journalism and a few industries.”

The political journalist Mark Halperin, who now runs 2WAY and has a show on Megyn Kelly’s network, said it was remarkable that “the left seems largely unaware that some of the smartest and most sophisticated Trump supporters in the nation from coast to coast are part of an overlapping set of text chains that allow their members to share links, intel, tactics, strategy, and ad hoc assignments. Also: clever and invigorating jokes. And they do this (not kidding) like 20 hours a day, including on weekends.” He called their influence “substantial.”