mstahl writes: "Barack Obama effectively clinched the Democratic presidential nomination Tuesday, becoming the first black candidate to lead a major party into a campaign for the White House. Obama sealed his victory based on public declarations from delegates as well as from an additional 18 who had confirmed their intentions to the AP. The count also included five delegates Obama was guaranteed as long as he gained 15 percent of the vote in South Dakota and Montana later in the day. It takes 2,118 delegates to clinch the nomination.
The current delegate count according to CNN.com is 2,097 to 1,914."