DENVER- AUGUST 26:  U.S. Sen. Barbara Mikulski (D-MD) (L) introduces U.S. Sen. Hillary Clinton (D-NY) at an EMILY's List gala during day two of the Democratic National Convention (DNC) at the Sheraton Denver Hotel August 26, 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.  (Photo by Max Whittaker/Getty Images)