According to the M-D data (12/6-10; 625 SC registered voters; 400 Republican regular primary voters), Gov. McMaster would lead former state cabinet secretary Catherine Templeton, 51-21%, while Lt. Gov. Kevin Bryant garners only 8% support, and former Lt. Gov. Yancey McGill secures just 1% backing. The South Carolina primary is June 12th, with a June 26th run-off if no candidate secures a majority vote.