DENVER - AUGUST 27: U.S. Democratic Presidential nominee Sen. Barack Obama (D-IL) (L) speaks as U.S. Democratic Vice-Presidential nominee Sen. Joe Biden (D-DE) smiles during day three of the Democratic National Convention (DNC) at the Pepsi Center August 27, 2008 in Denver, Colorado. U.S. Sen. Barack Obama (D-IL) will be officially be nominated as the Democratic candidate for U.S. president on the last day of the four-day convention.
DENVER - AUGUST 27: U.S. Sen. Barack Obama (D-IL) greets U.S. Sen. Nancy Pelosi (D-CA) after a surprise appearance at day three of the Democratic National Convention (DNC) at the Pepsi Center August 27, 2008 in Denver, Colorado. U.S. Sen. Barack Obama (D-IL) will be officially be nominated as the Democratic candidate for U.S. president on the last day of the four-day convention.
DENVER - AUGUST 27: Convention goers attend day three of the Democratic National Convention (DNC) at the Pepsi Center August 27, 2008 in Denver, Colorado. U.S. Sen. Barack Obama (D-IL) will be officially be nominated as the Democratic candidate for U.S. president on the last day of the four-day convention.
DENVER - AUGUST 27: U.S. Democratic Presidential nominee Sen. Barack Obama (D-IL) (R) speaks as U.S. Democratic Vice-Presidential nominee Sen. Joe Biden (D-DE) looks on during day three of the Democratic National Convention (DNC) at the Pepsi Center August 27, 2008 in Denver, Colorado. U.S. Sen. Barack Obama (D-IL) will be officially be nominated as the Democratic candidate for U.S. president on the last day of the four-day convention.
DENVER - AUGUST 27: U.S. Democratic Vice-Presidential nominee Sen. Joe Biden (D-DE) speaks during day three of the Democratic National Convention (DNC) at the Pepsi Center August 27, 2008 in Denver, Colorado. U.S. Sen. Barack Obama (D-IL) will be officially be nominated as the Democratic candidate for U.S. president on the last day of the four-day convention.
DENVER - AUGUST 27: U.S. Democratic Presidential nominee Sen. Barack Obama (D-IL) (R) and U.S. Democratic Vice-Presidential nominee Sen. Joe Biden (D-DE) applaud during day three of the Democratic National Convention (DNC) at the Pepsi Center August 27, 2008 in Denver, Colorado. U.S. Sen. Barack Obama (D-IL) will be officially be nominated as the Democratic candidate for U.S. president on the last day of the four-day convention.
DENVER - AUGUST 27: U.S. Democratic Vice-Presidential nominee Sen. Joe Biden (D-DE) walks with a family member on stage after his nominating speech on day three of the Democratic National Convention (DNC) at the Pepsi Center August 27, 2008 in Denver, Colorado. U.S. Sen. Barack Obama (D-IL) will be officially be nominated as the Democratic candidate for U.S. president on the last day of the four-day convention.