Breitbart senior editor-at-large Joel Pollak ordered staffers in an internal chatroom to stop defending Michelle Fields, the staffer who was allegedly manhandled by Trump campaign manager Corey Lewandowski.The internal Breitbart Slack chats, which were obtained by BuzzFeed News, put on display the tension between those at Breitbart who want to act like a publisher — defending their reporter and finding the truth — and those entangled in politics.“STOP tweeting about the story. Stop speculating about the story,” Pollak told staffers in one message, and reminded them that “you were given explicit instructions.”“You may wish to defend your colleague, and that...