The Economist asks: Why does Donald Trump want to be president?

To find what motivates Donald Trump, Anne McElvoy drops in at the opening of his new hotel, speaks to his biographer, Marc Fisher and investigates 'Trumpism' with sociologist, Arlie Russell Hochschild. Also on the show: linguistic expert Sharon Jarvis discusses the Republican candidate's communication style. And comedian Sage Boggs unveils the art of Trump parody.