Democratic presidential candidate, Sen. Barack Obama, D-Ill, speaks at the 48th Quadrennial Session of the African Methodist Episcopal Church in St. Louis, Mo., Saturday, July 5, 2008. (AP Photo/Jae C. Hong)
Democratic presidential candidate, Sen. Barack Obama, D-Ill, speaks at the 48th Quadrennial Session of the African Methodist Episcopal Church in St. Louis, Mo., Saturday, July 5, 2008. (AP Photo/Jae C. Hong)
Democratic presidential candidate, Sen. Barack Obama speaks during the African Methodist Episcopal Church's 48th Quadrennial Session General Conference Saturday, July 5, 2008, in St. Louis. (AP Photo/Jeff Roberson)
Democratic presidential candidate, Sen. Barack Obama, D-Ill, left, greets supporters at the 48th Quadrennial Session of the African Methodist Episcopal Church in St. Louis, Mo., Saturday, July 5, 2008. (AP Photo/Jae C. Hong)
Democratic presidential candidate, Sen. Barack Obama speaks during the African Methodist Episcopal Church's 48th Quadrennial Session General Conference Saturday, July 5, 2008, in St. Louis. (AP Photo/Jeff Roberson)
Democratic presidential candidate, Sen. Barack Obama, D-Ill, left, shakes hands with a bishop at the 48th Quadrennial Session of the African Methodist Episcopal Church in St. Louis, Mo., Saturday, July 5, 2008. (AP Photo/Jae C. Hong)
Democratic presidential candidate, Sen. Barack Obama, D-Ill., talks to reporters in his campaign charter en route to St. Louis, Mo., Saturday, July 5, 2008. (AP Photo/Jae C. Hong)
Democratic presidential candidate Sen. Barack Obama, D-Ill., talks to reporters in his campaign charter en route to St. Louis, Mo., Saturday, July 5, 2008. (AP Photo/Jae C. Hong)
Reporters hold up their voice recorders while listening to Democratic presidential candidate Sen. Barack Obama, D-Ill., during a media availability in his campaign charter en route to St. Louis, Mo., Saturday, July 5, 2008. (AP Photo/Jae C. Hong)
A reporter tapes Democratic presidential candidate Sen. Barack Obama, D-Ill., during a media availability in his campaign charter en route to St. Louis, Mo., Saturday, July 5, 2008. (AP Photo/Jae C. Hong)