I am not sure what he means by prewindow. He is being purposely vague, but there is definitely some change coming.
"BLITZER: Let me get your reaction to this proposal. As you know, for years the Iowa caucus was first going forward with the presidential nominee, followed by the first primary in New Hampshire. There's now a recommendation out there that after the Iowa caucus there be two other caucuses in other states that may be more diverse than Iowa or New Hampshire before there's the first primary in New Hampshire. Is this a good idea?
DEAN: Well, it's certainly a good idea to have more geographic diversity and more ethnic diversity in the Democratic nominating process. After all, we are the most diverse party, certainly in this country, and probably the most diverse party on the face of the earth in terms of the different kinds of people who keep us in power. And who we need to put us back in power.
So I'm very supportive of this notion that diversity, both geographic and ethnic, in the prewindow.
We are committed to leaving Iowa first as the first caucus in the country and New Hampshire as the first primary in the country.
BLITZER: But do you support adding two caucuses between those two events?
DEAN: Well, I'm not going to -- you know, there's some wriggle room. The only commitment I'm going to make to you right now is there will be earlier events, and there will be some events, or at least one event in between Iowa and New Hampshire, and there will be before the window somewhere between four and six events, including Iowa and New Hampshire. That's what the commission recommended. I haven't had a chance to sit down with the rules committee. But we will have diversity in the prewindow. "
http://transcripts.cnn.com/TRANSCRIPTS/0603/12/le.01.html