A bicyclist rides through the plaza on the east side of the U.S. Capitol in Washington, D.C. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

President Barack Obama joins Former President Bill Clinton on stage during the Democratic National Convention in Charlotte, N.C., on Wednesday. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

V ice President Joe Biden, left, and President Obama embrace following Biden's vice-presidential nomination acceptance speech at the Democratic National Convention in Denver, Wednesday, Aug. 27, 2008. Paul Sancya/AP hide caption

itoggle caption Paul Sancya/AP