I take that back. Detroit was 94% with Gore winning by 266423. Benton Harbor was 96% for Gore(won by 2380), but luckily is so small, that Bush won that county with 55%.
I don't think there is a more democrat big city in the country than Detroit. I thought maybe Baltimore or Chicago, but even they were beat.
Obviously, Detroit has a higher percentage of voters who have assumed room temperature than the others.