Chris Hughes and Sean Eldridge have always been entitled brats. And now the media finally noticed. How swiftly things change. In just the past two months, one half of this pair managed to single-handedly destroy a storied journalistic institution, while the other suffered a crushing electoral defeat in New York’s 19th Congressional District. Last week, the 31-year-old Hughes forced the resignations of both the editor and literary editor of The New Republic, whose 100th anniversary he presided over last month at a star-studded gala in Washington, D.C. In protest of the magazine’s newly ensconced CEO’s plan to transform TNR into...