On this encore broadcast of dialogue, our guest, Katrina vanden Heuvel, discusses her latest book, The Change I Believe In: Fighting for Progress in the Age of Obama, a collection of her commentaries and polemics from the first years of the Obama administration.  Vanden Heuvel is editor and publisher of The Nation magazine. She is a frequent commentator on ABC, MSNBC, CNN, and PBS and she writes a weekly Web column for the Washington Post. Her blog, “Editor’s Cut,” appears at thenation.com.