In what part of America did John Kerry seriously underpeform expectations?

[Stranger in a strange land]

Generally he did quite poorly in the suburbs (this is why he came up short in FL, NV, and OH), and at the time there was a lot of hand-wringing about how 95 of the 100 fastest-growing counties in the country had voted Republican. Of course, those areas were all devastated by the subprime collapse and haven't been nearly as strong for the GOP since.