President Barack Obama arrives at Chicago O'Hare International Airport on Air Force One, Wednesday, April 2, 2014, in Chicago, as he travels to attend Democratic National Committee (DNC) events. (AP Photo/Carolyn Kaster)
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President Barack Obama arrives at Chicago O'Hare International Airport on Air Force One, Wednesday, April 2, 2014, in Chicago, as he travels to attend Democratic National Committee (DNC) events. (AP Photo/Carolyn Kaster)
