(CNN) - Mitt Romney's at the top of a new poll of people likely to vote in South Carolina Republican presidential primary.
According to an American Research Group survey released Monday, 25 percent of those questioned say if the primary were held today, they'd vote for the former Massachusetts governor, who's making his second bid for the GOP presidential nomination.
The poll indicates that 16 percent support former Alaska Gov. Sarah Palin, who is considering a run for the White House but hasn't taken any concrete steps to launch a campaign. Thirteen percent say they'd vote for Rep. Michele Bachmann of Minnesota, with ten percent backing former Godfather's Pizza CEO and radio talk show host Herman Cain. Every other candidate questioned in the poll is in single digits.
South Carolina holds the first southern primary in the presidential primary and caucus calendar. Since 1980 the winner of the S.C. Republican primary has gone on to win the GOP presidential nomination.
The American Research Group poll was conducted July 12-17, with 600 likely South Carolina Republican presidential primary voters questioned by telephone. The survey's overall sampling error is plus or minus four percentage points.