Rick Santorum has slowed the Mitt Romney streak in GOP primaries with a surge of his own tonight, scoring victories in both Minnesota and Missouri.  He also leads in Colorado, but the contest is currently too close to call.

Is this a game-changer, or simply a bump in the road for Romney?

UPDATE:  


Fox News is reporting that Rick Santorum has also won in Colorado.  From their breaking news ticker:

“Colorado Republican Party Says Rick Santorum Wins Colorado Caucuses”

From MSNBC (updated):

Rick Santorum scored victories in the Minnesota, Missouri, and Colorado nominating contests Tuesday night, winning him no actual delegates, but nonetheless blocking Mitt Romney’s bid to keep alive a streak of victories in the Republican presidential primary.

NBC News declared Santorum the projected winner of the Missouri primary, the Minnesota caucus, and the Colorado caucus. NBC will not be allocating any delegates from Missouri, Minnesota, or Colorado to Santorum in its projected count.

Romney finished third in Minnesota, a state where he won its 2008 caucuses, and where a key campaign surrogate, Tim Pawlenty, served two terms as governor.

CNN adds:

Rick Santorum won the Missouri primary and Minnesota caucuses Tuesday in results that reshaped the Republican presidential race by raising questions about frontrunner Mitt Romney’s ability to attract broad conservative support.

The former Pennsylvania senator was also leading in the Colorado caucuses, and would score a major upset over the front-running Romney if the trend held.

… 

The victory in a state Romney won in his unsuccessful 2008 presidential bid was a strong statement by Santorum that he represents a major conservative challenge to the former Massachusetts governor and Gingrich, the former House speaker.

And from Fox News:

Romney is still ahead in the delegate count, despite Santorum’s big night. But Santorum’s victories disrupt the narrative that the GOP presidential contest had become a two-person race between Gingrich and Romney.

In his victory speech, Santorum said “Conservatism is alive and well in Missouri and Minnesota.”


Question is, is it alive and well in the rest of the country?


“I don’t stand here and claim to be the conservative alternative to Mitt Romney,” Santorum declared. “I stand here to be the conservative alternative to Barack Obama.”


Michelle Malkin makes two great points:

If Santorum sweeps these critical battleground states tonight, he will have won more states than “frontrunner” Mitt Romney (he has snagged three states).
Nothing is inevitable in politics.
Also noteworthy: Santorum is doing this with just a fraction of Mitt Romney’s money.
Money can take you far, but just like Mitt Romney learned in 2008 and is learning again, it can’t seal the deal