fox's doug luzzader is joining us from capitol hill. good morning. >> good morning, allison. the south carolina primary is tonight you can tell it from the tone of some of the candidate that the race is tightening. you can barely hear mitt romney say that. >> i know when it's time to make a strategic retreat. >> reporter: just hours earlier, rick perry had dropped out, endorsing newt gingrich, but bad news for gingrich, too. appearing on abc news, his ex- wife accused him of once asking her for an open marriage so he can continue an affair with his current wife, callista. >> do you want to respond? >> no but i will. i am appalled that you would begin a presidential debate on a topic like that >> gingrich called the story false and the other three on stage chose not to pile on. the guy on the war path, though, last night, rick santorum, slamming both gingrich and romney for once slamming health care reform similar to president obama's. >> i've been fighting for health reform, private sector bottom up, the way america works best for 20 years while these two guys were playing fo