Poll: Comes down to Romney and Santorum in Michigan

(CNN) – Mitt Romney and Rick Santorum remain locked in tight primary battle in Michigan, according to a new poll.

The American Research Group survey released Monday showed Santorum with a slight lead among registered voters at 36% over Romney's 35% ahead of Tuesday's contest. Ron Paul followed with 15% and Gingrich came in with 8% support.

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Santorum, the former Pennsylvania senator, has lost two percentage points since a similar survey conducted last week, while Romney gained one percentage point, discrepancies within the poll's sampling error.

The race in Michigan has intensified between Romney, a Michigan native, and Santorum, with both looking for a strong showing to aid their campaigns in the lead-up to Super Tuesday, March 6, when voters in 10 states will cast ballots.

ARG surveyed 600 likely Republican primary voters between February 25 and February 26 with a sampling error of plus or minus four percentage points.

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