WASHINGTON, DC – DECEMBER 11: (AFP OUT) U.S. President Barack Obama, first lady Michelle Obama (L) and daughters Malia Obama (R) and Sasha Obama (2L) walk from the White House across Lafayette Park to St. John’s Church for Sunday services December 11, 2011 in Washington, DC. Obama stance on faith was attacked in a commercial by Rick Perry, claiming he has a “war on religion”. (Photo by Mike Theiler-Pool/Getty Images)