NBC reports that for the first time in the 2008 Democratic Presidential Primary, Barack Obama leads Hillary Clinton in terms of overall delegates.

Obama leads Clinton 1078 - 969 in terms of delegates selected in Democratic Primaries and Caucuses, and 1306 - 1270, including unelected "super delegates" who have already committed to a candidate.

Obama has now won 8 consecutive primaries or caucuses, and holds a 21-10 lead over Clinton in terms of states won. However, Clinton has won larger states, including California and New York and holds a commanding lead in terms of pledged "super delegates", which includes elected office holders and members of the Democratic Party apparatus.