February was supposed to be a sleepy month in the GOP presidential primaries. Instead, we might be seeing a paradigm shift, and all on a night when no delegates are formally pledged.

Former Sen. Rick Santorum was expected to do relatively well in Missouri, where Gingrich is not on the ballot. It was believed he might even beat former Massachusetts Gov. Mitt Romney. He was not by any means expected to crush Romney, as he seems to be doing by a decisive margin.