Lisa Miller, an associate editor at New York magazine, discusses her new profile of U.S. Secretary of Education Betsy DeVos. Miller discusses the unwillingness of people close to DeVos to discuss her on the record -- including current Department of Education employees  -- made this one of the most challenging profiles she’s ever written. What do we know about DeVos’ vision for the nation’s public schools that we didn’t know six months ago? Who is advising her as she struggles to overcome a steep learning curve on education issues outside her school choice sweet spot? Is DeVos’ effectiveness hampered by the unpopularity of President Donald Trump? And which of her policy directives have surprised observers on both sides of the political aisle?