President Barack Obama greets supporters after speaking at a campaign stop at The Mississippi Valley Fairgrounds, Wednesday, Oct. 24, 2012, in Davenport, Iowa. The President is on a two

 

              President Barack Obama greets supporters after speaking at a campaign stop at The Mississippi Valley Fairgrounds, Wednesday, Oct. 24, 2012, in Davenport, Iowa. The President is on a two
President Barack Obama greets supporters after speaking at a campaign stop at The Mississippi Valley Fairgrounds, Wednesday, Oct. 24, 2012, in Davenport, Iowa. The President is on a two day campaign trip across six battleground states. (AP Photo/Charlie Neibergall)