Obama has the chance to deal the knockout blow March 4, but it's a tall order.
From tomorrow's New York Times,
[....]Mrs. Clinton held a buck-up-the-troops conference call on Monday with donors, superdelegates and other supporters; several said afterward that she had sounded tired and a little down, but determined about Ohio and Texas.Both states had been considered safe for the Clintons, but Obama now has all the momentum and most the cash. It would appear that narrow Clinton victories are not enough. My feeling is that Obama has a real chance to win Ohio but I don't know what to think about Texas. Oddly, I can find no polling on either state although I have to believe both states will be polled very soon.
They also said that they had not been especially soothed, and that they believed she might be on a losing streak that could jeopardize her competitiveness in those states.
“She has to win both Ohio and Texas comfortably, or she’s out,” said one superdelegate who has endorsed Mrs. Clinton, and who spoke on condition of anonymity to share a candid assessment. “The campaign is starting to come to terms with that.” Campaign advisers, also speaking privately in order to speak plainly, confirmed this view