President Obama walks Oct. 24, 2012, across the tarmac to greet supporters upon his arrival on Air Force One at the Quad Cities International Airport in Moline, Ill., as the president began a two-day campaign blitz, through eight states with stops in key battleground areas of Iowa, Colorado, Nevada, Ohio and Virginia. (Associated Press)

Photo by: Pablo Martinez Monsivais

President Obama walks Oct. 24, 2012, across the tarmac to greet supporters upon his arrival on Air Force One at the Quad Cities International Airport in Moline, Ill., as the president began a two-day campaign blitz, through eight states with stops in key battleground areas of Iowa, Colorado, Nevada, Ohio and Virginia. (Associated Press)