Breadcrumb Home Cary Covington discusses presidential candidates at 'back of pack' Sunday, August 16, 2015 http://cbs2iowa.com/news/features/top-stories/stories/O-39-Malley-Looks-For-Mom… As 2016 presidential candidates descend on the Iowa State Fair, UI Political Science Professor Cary Covington discusses those at the "back of the pack."