Patrick Ruffini has a bash. Money quote:

Because Romney's strength is pretty much all out there right now, the risk of failure is greater. If there is any team in politics that can pull it off, Romney’s can. But the risk is enormous. If he loses New Hampshire, it’s over.

The closeness of the race leaves no margin for error for any of the candidates, and that includes Giuliani and Thompson. The only difference is that Romney starts out with insanely high expectations in these early contests.

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