NORTH CHARLESTON, S.C. – Newt Gingrich lashed out angrily at the news media Thursday night for fresh reporting on his failed second marriage, in an extraordinary opening to a high-stakes debate two days before a pivotal GOP presidential primary in South Carolina.

"Trash," the former speaker of the House called it, as he was asked to respond to media reports at the very moment when he's gaining support and has pulled into a neck-and-neck contest in the state with Mitt Romney, the former governor of Massachusetts.

"I am appalled that you would begin a presidential debate on a topic like that," Gingrich said, his face flushed in anger, when asked about an ABC interview with his ex-wife in the opening question of a two-hour debate on CNN.

In the ABC report, Gingrich's second wife, Marianne Gingrich, broke a long silence to say that he had asked her to grant him an "open marriage" so he could maintain an extramarital relationship with a House aide, Callista Bisek, who later became his third wife.

Gingrich railed at ABC News for airing it, at CNN for asking about it, and at the news media generally for "destructive, negative" reporting – all drawing loud cheers and applause from the Republican audience of about 2,500.

"To take an ex-wife and make it two days before the primary a significant question is as close to despicable as anything I can imagine," he said.

When CNN moderator John King insisted he was only asking about a report aired by another network that was dominating the day's news, Gingrich turned on him as well. "It was repeated by your network, don't try to blame someone else," he said. "You chose to start the debate with it.

Asked to comment, former Pennsylvania Sen. Rick Santorum said it was a legitimate issue of character for voters to weigh. "I am a Christian, too, and I thank God for forgiveness," Santorum said. "But these are issues of our lives … issues of character for people to consider … those are things for everyone in this audience to consider."

Romney brushed it aside. "Let's get on to the real issues, that's all I've got to say," he said. Moments earlier, he had introduced himself by noting his marriage of 42 years and extensive family.

Rep. Ron Paul of Texas appeared to empathize with Gingrich, saying, "Too often all of us are on the receiving end of attacks by the media." He added, however, "I'm thankful my wife of 54 years is here with me tonight."

Moments later, Santorum lashed out at Gingrich for suggesting that Santorum should drop out of the race.

"Grandiosity has never been a problem with Newt Gingrich," Santorum said, noting that he bested Gingrich in Iowa and New Hampshire. "I don't want a nominee that I have to worry about going out and looking at the paper the next day and … worrying about what he is going to say next."

Gingrich, Santorum charged, also supported a version of government-mandated health care for years.

"The core of Obamacare is an individual mandate," he said. "You can't run rings around the fact, Newt, you supported the primary, core basis of what President Obama's put in place."

"Of course you can," Gingrich replied. "I was wrong and I figured it out."

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