I think Iowa's Dukakis' second best state in 1988, behind only Rhode Island!
Anyway, IA seems to be 'distancing', and Kerry is up about 5 there in my estimation.
that was mainly because of the farm crisis of the late 80's. the economy was absolutely pitiful there. Note that Dukakis didn't do too bad in the Dakotas either.
In the last three elections though, Iowa has been about a good as a bellweather as you can get. Compare the results there to the national ones. Almost a perfect mirror, even for Perot and Nader.