Yesterday I pointed out that “February 7 could prove to have been Super Tuesday if it turns out to be a key inflection point in the campaign.”  Two indications, I wrote, of such an inflection point would be “if Santorum now passes Newt Gingrich in national Republican surveys” and if he “continues to do better than Gingrich (and than Romney?) in poll match-ups against President Obama.”

Today, the Gallup national tracking poll of Republican voters has Santorum catching Gingrich at 20 percent apiece. This is a five-day rolling average. Some back-of-the-envelope math suggests that in Wednesday night’s polling, the first that would have captured voter reaction to Tuesday night’s results, Santorum must have been above 30 percent, pretty close to even with Romney (who is at 36 percent in the five-day), while Gingrich would have been below 20. In other words, Santorum is very likely to pull ahead of Gingrich nationally in tomorrow’s Gallup poll.