Professor Pundits is our periodic update on the 2012 presidential campaign with political science professors Matt Dickinson and Bert Johnson. In this edition: Bert was in both Iowa and New Hampshire and compares the style and substance of each of the leading candidates he saw. Bert recently offered in-depth observations of Iowa as a guest blogger in Matt’s “Presidential Power” blog. Matt looks ahead to South Carolina and the challenges the candidates face in that state. And both pundits discuss the major role Super PACs have played so far in the primary.