Mitt Romney's numbers in South Carolina are surging, and he now has a solid lead over his rivals for the Republican presidential nomination, according to a new survey of likely GOP primary voters in the Palmetto state. ......................................................... According to the poll, 37% of likely GOP primary voters in South Carolina say they are currently backing Romney ..................................................... Santorum and Gingrich are battling for second place, with Santorum at 19% and Gingrich at 18%