In Florida, the IRA paid an unwitting Trump supporter to build a cage on the back of a flatbed truck, and paid an actress to dress up as Clinton and sit in the cage at a rally while crowds chanted, “Lock her up.” When that took off, they promoted rallies in Pennsylvania, New York, and California. By the time the IRA campaign was fully revealed, years later, Putin’s trolls had reached 126 million Facebook users and received 288 million Twitter impressions—a staggering number, given that there are only 200 million registered voters in the United States, and only 139 million voted in 2016.

