Per NBC News, Sen. Barack Obama needs to pick up just 25 delegates tonight to reach a majortiy of pledged delegates -- "not counting some Edwards delegates, which the Obama campaign has
already added in to their totals."
"If Obama picks
up approximately 50 delegates tonight, then he'll clinch a majority of
the pledged delegates even if you add in Michigan and Florida as they
originally voted."
The New York Times calls the situation "delicate" for Obama. "While eager to proceed to a general election match with Senator John McCain of Arizona, the likely Republican nominee, Mr. Obama is also trying to bring the contest to a close in a way that allows him to win over Mrs. Clinton's supporters and unify the party."