In re Santorum

I confess to having paid almost no attention to the GOP “race,” in part because my two favorite prognosticators of such things have been saying for quite some time that there was no longer as a practical matter any question about the outcome. This, however, makes me wonder a bit. If Santorum is leading Romney by more than 2 to 1 among Republicans in Romney’s home state (a state in which Romney’s father was elected governor once upon a time on the Socialist Worker’s Party ticket) does this suggest it’s time to rethink his inevitability (assuming Gingrich drops out soon I suppose)?