You may know David Leonhardt from his wildly popular New York Times newsletter, "The Morning." What you may not know is that David is also a Pulitzer Prize-winning journalist who has spent years trying to understand why the standard of living for many Americans seems to be eroding. His findings are the subject of a new book, "Ours Was the Shining Future," which The Atlantic named one of the best of the year. He joins us today to talk about it.