Article Photos: Democrats seize upon Romney's choice of Ryan



President Barack Obama greets people waiting for him on the tarmac as he arrives at O'Hare International Airport on Air Force One, Saturday, Aug. 11, 2012, in Chicago. (AP Photo/Carolyn Kaster)

President Barack Obama greets people waiting for him on the tarmac as he arrives at O'Hare International Airport on Air Force One, Saturday, Aug. 11, 2012, in Chicago. (AP Photo/Carolyn Kaster)