August 21, 2020

How does this year's DNC fit in with the history of party conventions past? Doris Kearns Goodwin is perhaps the nation's best known presidential historian. For decades she has studied the highest office in the land -- and at one time viewed it from up close, as a young aide to Lyndon Baines Johnson. She recently wrote the book "Leadership in Turbulent Times" and she joins Christiane from Boston.

Political conventions are the stage upon which Presidential candidates need to employ one skill above all others: the art of persuasion. Jonah Berger, Professor at the Wharton School of Business, is an expert on such matters. His latest book, "The Catalyst: How to Change Anyone's Mind," argues that removing barriers is the key to changing the way people think. He speaks with Hari Sreenivasan.