If ___________ becomes president, I’m moving to ___________! The refrain comes up every four years, no matter who’s running. If Donald Trump becomes president, actress Lena Dunham says she’ll move to Canada. Comedian Jon Stewart says he’ll leave planet Earth. For his part, Trump said this week that if he wins and Dunham, Stewart and others actually leave, he will have done "a great service to our country." The threats aren’t limited to Trump-haters.