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	BLAINE, MN - FEBRUARY 7: Republican presidential candidate, former U.S. Sen. Rick Santorum arrives at a campaign rally February 7, 2012 in Blaine, Minnesota. Santorum is looking for a win is at least one of the three nomination contests today, caucuses in Colorado and Minnesota and a non-binding vote in Missouri. (Photo by Ben Garvin/Getty Images)
	BLAINE, MN - FEBRUARY 7: Republican presidential candidate, former U.S. Sen. Rick Santorum arrives at a campaign rally February 7, 2012 in Blaine, Minnesota. Santorum is looking for a win is at least one of the three nomination contests today, caucuses in Colorado and Minnesota and a non-binding vote in Missouri. (Photo by Ben Garvin/Getty Images)

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Santorum 'interrupts' Romney's march

A CNN panel reacts to GOP candidate Rick Santorum winning the Missouri primary.

Santorum 'interrupts' Romney's march

A CNN panel reacts to GOP candidate Rick Santorum winning the Missouri primary.