Vice presidential candidate Senator Joe Biden (D-DE) (R) embraces his son, Beau Biden, Attorney General of Delaware after his son introduced him at the 2008 Democratic National Convention in Denver, Colorado, August 27, 2008. U.S. Senator Barack Obama (D-Il) is expected to accept the Democratic presidential nomination at the convention on August 28. REUTERS/Larry Downing (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)