The Iowa Caucuses are a critical and closely watched part of the presidential nomination process. The 2012 Republican Iowa Caucus race was one of the most interesting and turbulent, and, as it turned out, the closest in caucus history. From the early stages of the race in March, 2011, through Caucus Day on January 3, 2012, no less than six candidates held the lead in Iowa or in national polls. The constantly changing dynamics of the race gave it an almost rollercoaster feel as candidates quickly rose and fell in the polls. In Riding the Caucus Rollercoaster Tim Hagle, a University of Iowa...