President Obama signs the proclamation marking the National Day of Prayer in the Oval Office in May 2009 while Joshua DuBois, director of the White House Office of Faith-based and Neighborhood Partnerships, looks on. DuBois has emerged as the president's go-to guy on all things religious.  Photo courtesy of The White House/Pete Souza

President Obama signs the proclamation marking the National Day of Prayer in the Oval Office in May 2009 while Joshua DuBois, director of the White House Office of Faith-based and Neighborhood Partnerships, looks on. DuBois has emerged as the president’s go-to guy on all things religious. Photo courtesy of The White House/Pete Souza