This seems a little premature, especially given IA polling (though the experts don’t ever seem to factor that in.) I’d understand making this move when he gets rid of the Toss-Up column altogether, but I definitely don’t buy IA-SEN flipping before NC-SEN, and polling doesn’t really back that up, either.
Eh, it does though. Greenfield's polling average is nearly +5 right now. I mean, it's quite possible that the usual IA polling error doesn't really materialize this year. I have no idea if it will or won't, but it's not assured.
IA polling average: Greenfield 47.09 - 43.66
NC polling average: Cunningham 46.67 - 41.55
And IA tends to be more off in Rs favor in general, though that isn't necessarily bound to be true.
What's interesting is that while Cunningham's lead is largely, there are fewer undecides in IA-Sen, though I think that's in large part because of that NYT and Emerson poll with a lot of undecided/3rd party in NC-Sen.