IT’S IOWA minus one month, and barring yet another resurrection, or something of similar improbability, it’s Mitt Romney versus Newt Gingrich. In a match race, here’s the scorecard:

Romney has managed to weather the debates unscathed. However, the brittleness he showed when confronted with the kind of informed follow-up questions that Bret Baier tossed his way Tuesday on Fox’s “Special Report” — the kind of scrutiny one doesn’t get in multiplayer debates — suggests that Romney may become increasingly vulnerable as the field narrows

Enter Gingrich, the current vessel for anti-Romney forces — and likely the final one. Gingrich’s obvious weakness is a history of flip-flops, zigzags and mind changes even more extensive than Romney’s — on climate change, the health care mandate, cap-and-trade, Libya, the Ryan Medicare plan, etc.