[HotHotHeat]

I'll stick with Politico on this one. No earlier than May 31st.

Not long after the polls close in the May 20 Kentucky and Oregon primaries, Barack Obama plans to declare victory in his bid for the Democratic presidential nomination.

And, until at least May 31 and perhaps longer, Hillary Clinton’s campaign plans to dispute it.

It’s a train wreck waiting to happen, with one candidate claiming to be the nominee while the other vigorously denies it, all predicated on an argument over what exactly constitutes the finish line of the primary race.

The Obama campaign agrees with the Democratic National Committee, which pegs a winning majority at 2,025 pledged delegates and superdelegates—a figure that excludes the penalized Florida and Michigan delegations. The Clinton campaign, on the other hand, insists the winner will need 2,209 to cinch the nomination—a tally that includes Florida and Michigan.

http://www.politico.com/news/stories/0508/10184.html