President South Carolina debate: Gingrich and Romney face each other - and their baggage

Mitt Romney and Newt Gingrich are very close in South Carolina polling. Going into Thursday night's four-man debate, the two front-runners each have new personal issues facing them.

Charles Dharapak/AP

Thursday night's GOP presidential debate in South Carolina sees a candidate line-up whittled down to just four contestants. Texas Gov. Rick Perry is history, having dropped out early in the day and thrown his unqualified support to former House Speaker Newt Gingrich.