A new Mason-Dixon Iowa poll was released today. Of 400 likely Democratic caucus-goers, 27 percent said they were undecided, followed by Clinton with 22 percent, Edwards with 21 percent, Obama with 18 percent, Richardson with 6 percent, and Biden with 4 percent.

The Clintonistas are triumphant over at MyDD, confident that Teresa Vilmain is already delivering the goods for Hillary, and that Bill Clinton's three-day campaign swing through Iowa in early July is going to seal the deal.

Wishful thinking, in my view. I have a question for Bleeding Heartland readers: how many undecided voters do you know who have NOT ruled out Hillary?

I know exactly two, out of scores and scores of undecided Iowa caucus-goers I have talked to over the last two months.

If 27 percent of Iowans really are undecided (and I wouldn't be surprised if the true proportion of undecideds is higher than that), then Hillary is going to fall behind once they make up their minds.

I wouldn't be surprised if Bill's visit gives Hillary a little bounce here, but ultimately, Iowans will understand that voting for Hillary is like voting for a Republican to appoint the next two or three Supreme Court justices. No thanks.