Steve Inskeep explains why Trump hung up on him over perfect questions

-- Steve Inskeep, Host of NPR's Morning Edition and author of the new book "Differ We Musts: How Lincoln Succeeded in a Divided America," joins David to discuss how partisanship and tribalism compare in the Trump era as compared to the Civil War, his viral interview with Donald Trump where Trump hung up on him, and much more. Get the book: