South Carolina poll: Walker, Bush neck-and-neck

Former Florida Gov. Jeb Bush, left, and Wisconsin Gov. Scott Walker

CNN (CNN)Wisconsin Gov. Scott Walker just barely edges former Florida Gov. Jeb Bush in a new poll of South Carolina likely Republican primary voters.

And Sen. Lindsey Graham comes in fourth in his home state, underscoring persistent questions about this viability in the race.
The survey, conducted by Winthrop University in Rock Hill, S.C., gives Walker 13.6% support to Bush's 12.7%, well within the survey's 3.2% margin of error, making Walker's lead statistically insignificant.
No other potential or declared GOP presidential contender cracks double-digit support in the survey, and a full quarter of respondents said they were still unsure of who they'd support, indicating the all important first-in-the-south primary state is still up for grabs.