Are America’s politicians getting dumb and dumber? This is a question Andy Borowitz addresses in his new book Profiles in Ignorance.

Starting with Ronald Reagan’s first campaign for governor in 1966 and culminating with the election of Donald J. Trump, Borowitz shows how, during the age of twenty-four-hour news and social media, the US has elected politicians to positions of great power whose lack of the most basic information is terrifying.

The New York Times-bestselling author joined Sean on the show...