FiveThirtyEight's Silver smacks down "tightening polls" narrative
                                
                                
                                    (Newser) -
                                    Calm down, writes Nate Silver at FiveThirtyEight.com. There's no need to panic over a couple of polls, trumpeted by Drudge, showing the race tightening. “Man, I thought I trained you guys better than this,” he notes. One, the Mason-Dixon poll, shows Obama up by only 4 in...