District of Columbia Democratic Presidential Primary took place on February 12 , 2008 , nicknamed the " Potomac Primary " because Maryland and Virginia , which border the Potomac River , also held Democratic primaries that day . Fifteen delegates were up for grabs in the District of Columbia Democratic Primary , including 10 delegates from the District of Columbia 's municipal subdivisions ( five delegates for Wards 1-4 , and five delegates for Wards 5-8 ) . An additional five delegates were awarded to the at-large winner , Barack Obama . These 15 delegates represented the District of Columbia at the Democratic National Convention in Denver , Colorado . A total of 24 unpledged delegates , known as superdelegates , also attended the convention and cast their votes as well . Barack Obama received the endorsements of Mayor Adrian Fenty and former Mayor Marion Barry ( both African Americans ) , while he and Hillary Clinton were both endorsed by various members on the District of Columbia City Council . Barack Obama won the District of Columbia , as he did the other Potomac contests that day . He earned 12 pledged delegates to Clinton 's 3
Democratic National Convention
2008 Democratic National Convention
2008 District of Columbia Democratic primary