
Sat Oct 18, 1:48 PM ET
Supporters cheer for Democratic presidential candidate, Sen. Barack Obama, D-Ill., at a rally in St. Louis, Mo., Saturday, Oct. 18, 2008.(AP Photo/Jae C. Hong)

Sat Oct 18, 1:49 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., bottom right, at a rally in St. Louis, Mo., Saturday, Oct. 18, 2008.(AP Photo/Jae C. Hong)

Sat Oct 18, 1:49 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., right, waves as he arrives at a rally in St. Louis, Mo., Saturday, Oct. 18, 2008.(AP Photo/Jae C. Hong)

Sat Oct 18, 1:50 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., right, waves as he arrives at a rally in St. Louis, Mo., Saturday, Oct. 18, 2008.(AP Photo/Jae C. Hong)

Sat Oct 18, 1:59 PM ET
Democratic presidential candidate, Sen. Barack Obama, D-Ill., speaks at a rally in St. Louis, Mo., Saturday, Oct. 18, 2008.(AP Photo/Jae C. Hong)

Sat Oct 18, 2:03 PM ET
Democratic presidential candidate Sen. Barack Obama, D-Ill., speaks to supporters under the Gateway Arch as the Old Courthouse stands in the background Saturday, Oct. 18, 2008, in St. Louis, Mo.(AP Photo/Jeff Roberson)

Sat Oct 18, 2:03 PM ET
Democratic presidential candidate Sen. Barack Obama, D-Ill., speaks to supporters under the Gateway Arch Saturday, Oct. 18, 2008, in St. Louis, Mo.(AP Photo/Jeff Roberson)