** FILE ** In this April 24, 2012, file photo President Barack Obama acknowledges the crowd after speaking at the University of North Carolina in Chapel Hill, N.C. (AP Photo/The News & Observer, Chuck Liddy, Pool)

Photo by: Chuck Liddy

** FILE ** In this April 24, 2012, file photo President Barack Obama acknowledges the crowd after speaking at the University of North Carolina in Chapel Hill, N.C. (AP Photo/The News & Observer, Chuck Liddy, Pool)