Decision 2012: 2012 Political Ads Flood the Airwaves

With the election less than two weeks away, President Barack Obama and Republican challenger Mitt Romney are picking up the pace of their campaigns -- particularly in the swing states that will determine the outcome of a close race.

Class discussion: Which states are the key to the victory in the race? What makes them so important? Commentators have said Romney has "moved to the center." What does that mean? How have candidates' positions on the issues changed? Why the change?