Ten-year old Barron Trump, Trump's youngest son and the first boy in the White House since JFK Jr., was shamelessly called both a “rapist” and a “school shooter” by left-wing writers and comedians on Twitter over the course of the weekend. These attacks come after Rosie O'Donnell made an unsubstantiated claim during Trump's campaign that Barron Trump was “autistic.” On Friday, “Saturday Night Live” writer Katie Rich tweeted: “Barron will be this country's first homeschool shooter.” Ms. Rich later deleted her tweet as well as her account, but there has been no apology from either her or NBC. Rich's credits...