This front-page story in tomorrow's NY Times captures the box Clinton is in.  She needs to draw an inside straight -- not impossible, but not likely either.  The article also points out that Obama is raising $1 million per day, with Clinton only raising half that:

Senator Hillary Rodham Clinton and her advisers increasingly believe that, after a series of losses, she has been boxed into a must-win position in the Ohio and Texas primaries on March 4, and she has begun reassuring anxious donors and superdelegates that the nomination is not slipping away from her, aides said on Monday.

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.

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.”

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February 12, 2008

For Clinton, Bid Hinges on Texas and Ohio

By PATRICK HEALY

www.nytimes.com/2008/02/12/us/politics/12clinton.html

Senator Hillary Rodham Clinton and her advisers increasingly believe that, after a series of losses, she has been boxed into a must-win position in the Ohio and Texas primaries on March 4, and she has begun reassuring anxious donors and superdelegates that the nomination is not slipping away from her, aides said on Monday.