FILE - This Oct. 28, 2012 file photo shows President Barack Obama walking to St. John's Episcopal Church in Washington from the White House with his daughters Sasha, left, and Malia. Ca

 

              FILE - This Oct. 28, 2012 file photo shows President Barack Obama walking to St. John
FILE - This Oct. 28, 2012 file photo shows President Barack Obama walking to St. John's Episcopal Church in Washington from the White House with his daughters Sasha, left, and Malia. Campaign 2012 is rich with images that conjure the seriousness and silliness that unfold side-by-side in any presidential race. Aww, who didn't smile and do a double-take when Malia and Sasha Obama walked on stage at the Democratic convention to join their mom and dad after the president's speech. The girls looked so much more poised and mature than when they stood on the convention stage four years earlier. (AP Photo/Jacquelyn Martin, File)