Abraham Lincoln was president of a divided country, and the lessons from his life might help guide America today. Jon Meacham is a Pulitzer Prize–winning biographer, the Rogers Chair in the American Presidency at Vanderbilt University and a fellow of the Society of American Historians. He joins host Krys Boyd to discuss his biography of the 16th president, from birth to assassination, and Lincoln’s conviction that slavery must be ended as a moral evil. His book is “And There Was Light: Abraham Lincoln and the American Struggle.”