On Sept. 10, 2018, @PoliteMelanie tweeted to her more than 20,000 followers: “Criticizing Trump in a book is just unfair. It’s like criticizing the Amish on television.” The next day, this tweet won the Chicago Tribune’s “Tweet of the Week” contest. What the Tribune’s readers didn’t know when casting their votes, however, was that “Melanie” was a Russian troll.