Democratic Presidential candidate Barack Obama (R) and Vice Presidential candidate Joe Biden (L) appear on stage at the end of the Democratic National Convention 2008 at the Invesco Field in Denver, Colorado, on August 28, 2008. The Illinois senator tonight formally accepted his nomination as the first African-American from a major party to run for the White House before more than70,000 people. AFP PHOTO Paul J. RICHARDS (Photo credit should read PAUL J. RICHARDS/AFP/Getty Images)