I’ve [David Frum] talked with well-funded Trump supporters who speak of recruiting a troll army explicitly modeled on those used by Turkey’s Recep Tayyip Erdogan and Russia’s Putin to take control of the social-media space, intimidating some critics and overwhelming others through a blizzard of doubt-casting and misinformation. The WikiLeaks Task Force recently tweeted—then hastily deleted—a suggestion that it would build a database to track personal and financial information on all verified Twitter accounts, the kind of accounts typically used by journalists at major media organizations. It’s not hard to imagine how such compilations could be used to harass or intimidate.