Written by
The Associated Press
WASHINGTON (AP) - Rick Santorum has delivered a stinging blow to front-runner Mitt Romney, winning political caucuses in Colorado and Minnesota in the race for the GOP presidential nomination.
Santorum also won a non-binding primary in Missouri that gave him some bragging rights but no delegates.
Santorum's three-state sweep raised fresh doubts about Romney's ability to win over conservative voters. And it gave Santorum grounds for claiming that he -- not Newt Gingrich -- is the strongest conservative alternative to Romney.
The Associated Press