After a roughly two-month hiatus, Sarah Palin's "One Nation" bus tour was back on the road this weekend. This time, she traveled across the Midwest, where she learned about past U.S. presidents -- and reacted to developing news about the 2012 presidential race. Earlier this week, the former Alaska governor announced on her website that she would be stopping by the Iowa State Fair on Friday, which put the political world on edge as she was coming to such an important early nominating state -- the day before the closely watched Ames Straw Poll. While at the fair, Palin said...