SPRINGFIELD, IL – AUGUST 23: Presumptive Democratic Presidential candidate U.S. Sen. Barack Obama (D-IL) takes to the stage with his Vice Presidential pick Sen. Joe Biden (D-DE) at the Old State Capitol August 23, 2008 in Springfield, Illinois. Obama announced Biden as his Vice Presidential running mate with a text message in the early morning on August 23, 2008. Biden is the chairman of the Senate Foreign Relations Committee and is familiar with foreign leaders and diplomats from around the world. (Photo by Joe Raedle/Getty Images)