Rick Santorum’s presidential campaign announced yesterday that it was opening “five new campaign offices to supplement its existing South Carolina headquarters in Mt. Pleasant, SC.” The new offices are in Greenville, Myrtle Beach, Spartanburg, Rock Hill and Columbia.

“We feel very confident … that the voters are going to end up coalescing around Rick Santorum, and I think that South Carolina is a good place to start that,” his campaign manager, Mike Biundo, told reporters Tuesday night in New Hampshire.

Biundo said Santorum’s campaign in the Palmetto State will benefit from the addition of the staff that helped the former Pennsylvania senator come within eight votes of beating Mitt Romney in Iowa.

“We took all our Iowa staff that wanted to go down,” Biundo told reporters. “We feel very good about our operation in South Carolina. I think we’re going to do very well there. … We’re already up with ads. We’ve gotten a mail piece out. … We’re gonna go everywhere on the ground. We’re obviously gonna put a lot more money into media than we did [in New Hampshire], certainly more than we did in Iowa, as well. … I think we have about a million dollars committed [to advertise in South Carolina] between what we’re putting in and what we’re gonna put in. So I feel pretty good about that now and we’ll be adding more and reassessing as things go along.”

The campaign also announced this morning that Santorum had won the endorsement of South Carolina state Rep. Greg Delleny, who was named the state’s “Pro-Life Legislator of the Year” in 2008, and recognized as “Legislator of the Year” in 2007 by the Palmetto Family Council.

Santorum is currently third in the Real Clear Politics average of South Carolina polls.