** FILE ** In this December 2011 file photo, President Obama with first lady Michelle Obama and their daughters, Sasha and Malia, walk from the White House to attend a Sunday service at St. John's Church, where every president since James Madison has worshipped. (Associated Press)

** FILE ** In this December 2011 file photo, President Obama with first lady Michelle Obama and their daughters, Sasha and Malia, walk from the White House to attend a Sunday service at St. John's Church, where every president since James Madison has worshipped. (Associated Press)