Obama directs St. Louis address to young, middle class

Dak Dillon/Senior Staff Photographer

Democratic presidential nominee Barack Obama leads a rally Saturday at the Liberty Memorial in Kansas City. Earlier in the day, Obama attracted about 100,000 supporters during a rally under the Gateway Arch in St. Louis.

Andrew Worrall/Senior Staff Photographer

Democratic presidential nominee Barack Obama addresses supporters under the Gateway Arch in St. Louis on Saturday. Secret Service officials estimated the crowd at 100,000.