Photograph of Obama in Philadelphia by Matt Rourke/AP This morning, Senator Barack Obama delivered a 45-minute speech at Philadelphia's National Constitution Center, attempting to put behind him the controversial remarks made by his mentor, pastor Jeremiah A. Wright. Though Obama quickly denounced the remarks last week, the story didn't go away. Today, he reiterated his condemnation of Wright’s more inflammatory beliefs about racism in America, but would not denounce him entirely, giving way to......