The Sunday talk shows have no think tankers this week, but South Carolina primary is front and center including appearances from Rick Santorum and Newt Gingrich.

■NBC’s Meeth the Press: Gov. Chris Christie (R-NJ); Joe Scarborough, msnbc; Mike Murphy, Republican strategist; Katty Kay, BBC; Chuck Todd, NBC; Philadelphia Mayor Michael Nutter; Washington, DC Mayor Vincent Gray

■ABC’s This Week: Republican presidential candidate Rick Santorum; George Will, ABC; Matthew Dowd, political strategist and ABC News analyst; Ron Brownstein, National Journal; Katrina vanden Heuvel, The Nation

■CBS’ Face the Nation: former Mississippi Governor Haley Barbour; Sen. Lindsey Graham (R-SC) Joe Klein, Time Magazine; Kelly Evans, Wall Street Journal, John Dickerson, CBS News

■CNN’s State of the Union with Candy Crowley:Rick Santorum; Newt Gingrich; Sen. Jim DeMint (R-SC); Rep. James Clyburn (D-SC)

■Fox News Sunday: Stuart Stevens, chief Romney strategist; Rep. John Boehner, (R-OH); Liz Cheney, Fox News; Liz Marlantes, Christian Science Monitor; Karl Rove, former Bush White House senior adviser and Fox News; Joe Trippi, Fox News

■CNN’s GPS with Fareed Zakaria: David Rubenstein, The Carlyle Group; Arianna Huffington, AOL/Huffington Post; Mort Zuckerman, U.S. News & World Report; David Frum, FrumForum; Steve Rattner, Willett Advisors LLC

■CNN’s Reliable Sources with Howard Kurtz: Brian Ross, ABC; Jennifer Rubin, Washington Post; Arthur Brisbane, New York Times; Mark Barabak, Los Angeles Times; Ryan Lizza, New Yorker

■NBC’s Chris Matthews Show: Kathleen Parker, Washington Post; Major Garrett, National Journal; Andrea Mitchell, NBC; Neil Swidey, Boston Globe