Wojtek, you went back on your own insight that there is no nation, but a congeries of regions and states.
The income correlation with voting for Bush holds across all regions. But NY distinguishes itself in that you have to reach right up into the highest bracket to find a majority for Bush. Even more marked for NYC. Go NY!
The education correlation with voting for Bush differs from region to region. The "national" average hides the differences between E, W, MW, and S. There might also be some auto-stuff going on here with race and income.
What is very, very clear is the role of the religious conservatives.
kj