Did Tuesday’s results matter? Nowhere near as much as the results from Iowa, New Hampshire, South Carolina, and Florida mattered. But primary campaigns rarely reach stasis; momentum shifts, ebbs, and flows, and the trio of contests yesterday offered a few hints that the storyline will change once again.Rick Santorum is on the verge of overtaking Newt Gingrich as the anti-Romney alternative.Santorum began this contest as the man of the hour, the little engine that could in a sweater-vest who challenged and beat the much-better-funded Mitt Romney . . . and yet he has, at the moment, an entire three...