Conversations host Harry Kreisler welcomes Pulitzer Prize winning historian and Princeton Professor Emeritus James M. McPherson for a discussion of his new book, "Trial by War." Their discussion focuses on the qualities that defined Abraham Lincolns leadership, how he came to define the role of commander in chief, the evolution of his thinking on national policy with regard to slavery, how his goal of saving the shaped the politics of the war, his relationship to his generals, and the thinking and circumstances that led to his suspension of habeas corpus and the initiation of military tribunals.