EXCLUSIVE: In the wake of Charlie Kirk's Sept. 10 assassination allegedly at the hands of a left-wing ideologue, a leftist gun club with ties to political violence posted recruiting flyers at Georgetown University with references to Kirk's death. "Hey fascist! Catch!" says a red flyer from the John Brown Gun Club posted on Georgetown's campus. The phrase is a nod to the same slogan which was allegedly written on a shell casing by Tyler Robinson, who stands accused of murdering Kirk at a Turning Point USA event at Utah Valley University. "The only political group that celebrates when Nazis die,"...