I don't like the guy, but I'll give Santorum this: He's fighting to the razor margins with Mittens in Ohio, despite being outspent 5-1 by him.
EDIT - Turnout estimates in GA, MA, OK and VA all lower than in '08. Only in VT is turnout expected to be up from '08. (27% spike in Evangelical vote in VT compared to '08.)
Voter turnout in Virginia? 5.5%.

I'm pretty sure we won't get these caucuses again in the GOP primaries in future elections. At least not this scheduled or formulated or booked.