What’s behind the mask of the snarling, hulking, steroid-crazed villain who wants to take down Batman and rule Gotham City? A plot to swing the presidential election! This week on his popular radio show, conservative host Rush Limbaugh casually tossed out the theory that it’s no accident that the evil genius in The Dark Knight Rises, the final film in Christopher Nolan’s Batman trilogy, bears the same name as the much-maligned private equity firm founded by Mitt Romney. Bane is the very, very bad guy out to kill Batman. Bain ...