NO SLAM DUNK: Arne Duncan may exude a calm demeanor, but that doesn’t stop him from stoking the furor of politicians, unions and suburban moms. POLITICO’s profusely detailed profile of the US education secretary offers a deep look into the difficult straits Duncan has had to navigate over important—but politically toxic—issues including testing, student debt, Common Core and Race to the Top. It’s a wrenching piece at times—so much that three of the author’s sources broke down in tears.