As a couple of people have pointed out, the latest Zogby poll has such a drastic change due to a change in the methodology - the "leaners" are now put in with the decideds. There's nothing wrong with this - Zogby's job this close to the election is to make his best guess, given the information, about what the outcome will be.
But, on the other hand, obviously polls have an influence, to some degree, on the outcome. So, if this outlier of a result gets pushed, as Drudge is doing now, it could help give Dean the "comeback kid" momentum. Zogby can make a self-fulfilling prophesy.
Anyway, it's increasingly clear that the big loser of Iowa was the guy who didn't even run in it - Clark. One wonders what he can do to get the Big Mo back.
...and, what Kos says, which is much the same.
