One day after the resignation of University of Missouri System President Tim Wolfe, in the midst of protests fueled by dissatisfaction with the response to racist incidents on the Columbia campus, rumors began to bubble on Twitter: The KKK was in town. But those rumors were false — and encouraged by a Twitter troll whose activity indicates it was actually part of a Russian-linked troll campaign that utilized a strategy similar to the one deployed in the U.S. during the 2016 election.…