Obama outraising Clinton 2 or 3 to 1 will be the decisive factor I think:

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February 8, 2008

Obama Outshines Clinton at Raising Funds

By PATRICK HEALY and JEFF ZELENY

www.nytimes.com/2008/02/08/us/politics/08clinton.html

Concerned that it could lose several primaries and caucuses through the rest of February, Senator Hillary Rodham Clinton’s campaign sought to create an alternate storyline of success on Thursday by announcing that Mrs. Clinton had raised $7.5 million online so far this month.

That unusually high figure was quickly overshadowed by Senator Barack Obama’s announcement that he had raised the same amount in 36 hours since the 22-state contest on Tuesday, in addition to the $32 million that he raised in January.

Mrs. Clinton drew $13.5 million in January.