FILE - In this Oct. 23, 2012 file photo, President Barack Obama takes the podium after being introduced by Vice President Joe Biden at a joint campaign rally, at Triangle Park in Dayton, Ohio.

Photo by: Al Behrman

FILE - In this Oct. 23, 2012 file photo, President Barack Obama takes the podium after being introduced by Vice President Joe Biden at a joint campaign rally, at Triangle Park in Dayton, Ohio.