Liberal journalist Hendrik Hertzberg courted controversy Sunday by bashing President Trump and openly questioning in a tweet: “Time for a military coup?” After a request for comment, the left-wing New Yorker magazine reporter weakly attempted to defend himself in a tweet, claiming he was being “sarcastic.” Hertzberg, a longtime political commentator and staff writer at the New Yorker, was a conscientious objector during the Vietnam War and later served as then-President Jimmy Carter’s chief White House speechwriter. Over three hours after his initial tweet made waves, Hertzberg followed up by tweeting: “As somebody or other once said, I was being...