John Dickerson talks with author Gautam Mukunda about his new book Picking Presidents: How to Make the Most Consequential Decision in the World. They talk about how Mukunda’s first book, Indispensable: When Leaders Really Matter laid the groundwork for Picking Presidents. Later, Dickerson and Mukunda dig into why ‘intellectual brilliance’ – which goes beyond IQ - is a strong predictor of presidential performance and how the human portion of the job of president is changing.  Tweet us your questions @SlateGabfest or email us at gabfest@slate.com. (Messages could be quoted by name unless the writer stipulates otherwise.) Podcast production by Cheyna Roth. Learn more about your ad choices. Visit megaphone.fm/adchoices