(msnbc) - Two days until South Carolina’s GOP primary, John McCain and Mike Huckabee are locked in a virtual tie in that contest, according to a new MSNBC/McClatchy/Mason-Dixon poll.

McCain leads Huckabee by two points, 27%-25%, which is within the survey’s 5% margin of error. They’re followed by Mitt Romney at 15%, Fred Thompson at 13%, Ron Paul at 6%, and Rudy Giuliani at 5%. Eight percent say they’re undecided.

In the Democratic contest, Barack Obama has a nine-point lead over Hillary Clinton, 40%-31%, with John Edwards -- who won this state in 2004 -- at 13%. Fifteen percent say they’re undecided. The largest chunks of undecided voters are women and African-Americans, which could be a boon to either Clinton or Obama.