The GOP candidates have become hugely impressive in debate. Informed. Able to turn attacks around and give it back even better. Crisp and detailed in laying out their positions. But Gingrich stood out. He got a standing ovation just before a commercial break. Throughout, he projected authenticity of passion. And again and again, he was original, witty, driving sharp, resonating distinctions between the GOP and the Obama administration. He may just have revived his candidacy tonight. Keep in mind, this was on a night when all were strong.