Presidential Ebb and Flow

Every presidency ebbs and flows.  President Obama seems to be going through an ebb, as his job approval rating drops to the lowest of his presidency.  Host Ben Kieffer talks with presidential historian Tim Walch, former Director of the Herbert Hoover Presidential Library and Museum and Donna Hoffman, Associate Professor and Chair of Political Science at University of Northern Iowa, about the ebb and flow of presidencies through history, and what they can tell us about presidential popularity today.