Rick Santorum has pulled slightly ahead of Mitt Romney in Republican primary voters’ preference for the presidential nomination, a national CBS News/New York Times Poll shows.

Ron Paul is now in third, followed by former Speaker of the House Newt Gingrich.

Just three points over Romney, Santorum’s lead in the national survey is within the poll’s margin of error, but after wins last week in three states, 30 percent of Republican primary voters now say they support Santorum for the nomination.

The socially conservative former Pennsylvania senator received the backing of just 16 percent of Republican primary voters in a similarly worded question last month, leaving him in third place behind Gingrich.

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