I posted this chart yesterday, but it's worth another look. Despite the feverish intensity of this campaign, despite the endless hours, turned into days, turned into weeks that we've spent analyzing every nuance of it...nothing has changed in four months.

The campaign is over. On Tuesday, Barack Obama will reach the most important milestone so far in the campaign, 1,627 pledged delegates. That won't make him the official nominee -- that can't happen until the convention in August -- but it will be the most concrete sign yet that Barack Obama is the presumptive nominee of the Democratic Party.