Gallup, Pew Polls: Santorum Ties Romney

Republican presidential contender Rick Santorum has vaulted into a front-runner’s position with Mitt Romney in two national polls that show the race for the GOP nomination becoming a two-man statistical tie. The polls, by Gallup and the Pew Research Center, reflect the topsy-turvy nature of this GOP race, with Santorum shaking up the perceived leader's status after winning all three contests on Feb. 7 and the fact that top GOP leaders continue to question Romney's conservative credentials.

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