Six days before South Carolina, it’s social-conservative Sunday. You’ve got Santorum on Fox and CBS and Perry on ABC and CNN, but Newt’s the one to watch to see how he handles Bainmania in the home stretch. Will he dig in or play good cop/bad cop with his PAC? His interview with Gregory makes “Meet the Press” this morning’s best bet.

Or actually, is “Face the Nation” our best bet? You’ve got Newt there too, plus Santorum, plus Jim DeMint in his last chance to speak directly to South Carolinians before the big vote. He’s said before he won’t endorse in the primary, but harsh words for Newt’s Bain messaging could help Romney. Here’s the line-up from the LA Times:

State of the Union With Candy Crowley (CNN) South Carolina primary; politics: Presidential candidate Gov. Rick Perry (R-Texas). The evangelical vote in South Carolina: Rev. Brad Atkins, South Carolina Baptist Convention; Bob Jones III, Bob Jones University…

Meet the Press (NBC) South Carolina primary: Presidential candidate Newt Gingrich. Upcoming political battles: Sen. Harry Reid (D-Nev.). GOP presidential race; South Carolina primary: Sen. Lindsey Graham (R-S.C.); Rep. Tim Scott (R-S.C.).

This Week With George Stephanopoulos (ABC) Presidential candidate Gov. Rick Perry (R-Texas) and comedian Stephen Colbert. Panel: George Will; Cokie Roberts; Jonathan Karl; Peggy Noonan; Paul Krugman.

Fox News Sunday With Chris Wallace (Fox) GOP presidential race: former Sen. Rick Santorum (R-Pa.). Mitt Romney’s history with Bain Capital: Rick Tyler. Private equity: Chris Chocola, Club for Growth. Panel: Brit Hume; Kirsten Powers; Bill Kristol; Juan Williams…

Face the Nation (CBS) GOP presidential candidates Newt Gingrich and Rick Santorum; Sen. Jim DeMint (R-S.C.); author Jodi Kantor (“The Obamas”).