President Barack Obama and first lady Michelle Obama walk off Air Force One after arriving at O'Hare International Airport in Chicago, Tuesday, Nov. 6, 2012. (AP Photo/Paul Beaty)

 

              President Barack Obama and first lady Michelle Obama walk off Air Force One after arriving at O
President Barack Obama and first lady Michelle Obama walk off Air Force One after arriving at O'Hare International Airport in Chicago, Tuesday, Nov. 6, 2012. (AP Photo/Paul Beaty)