In episode four of this five-part series on the Iowa caucuses, we take you behind the scenes as the campaigns prepare for one of the biggest nights of the primary season, the Liberty and Justice Dinner. Obama’s speech at the event back in 2007 gave his candidacy an enormous boost, but we’ll explain why the evening is as much about what you say as how well you’ve organized. Then we’ll consider proposals to change the primary process that would reduce Iowa’s influence as we continue to wrestle with the question: is this really the best way to pick a president? This series is hosted by Tommy Vietor and produced by Pineapple Street Studios.