In 2000, there was a strong correlation between the population of the county and how likely is was to vote for Gore vs. Bush. Thus, the large counties overwhelmingly went for Gore, and the small counties even more so overwhelmingly went for Bush. The same is true for the states...see
this for details regarding the states.
So...here's what I found...
Counties with less than 5000 people: Bush 68.0%, Gore 28.2% (fortunately, the votes from these counties were less than 0.4% of the total vote!)
Counties with 5000-24999 people: Bush 56.8%, Gore 40.1%
Counties with 25000-99999 people: Bush 56.2%, Gore 40.5%
Counties with 100000-499999 people: Bush 51.5%, Gore 44.9%
Counties with 500000 people or more: GORE 55.8%, Bush 40.3%
Only counties (and Louisiana parishes) are included; independent cities, like Baltimore, St. Louis, D.C. or the many examples in Virginia, and Alaskan districts are not included (though independent cities are more Dem. than Rep.--a quick calculation of the "remainder"--but not "verified", meaning there could be mistakes due to something I've missed--showed it to be about 57% to 40% Gore over Bush).
This definitely tells us what many of us knew all along--people in higher-populated areas (esp. cities) are more progressive than those in lower-populated areas.
Soon (like in an hour or less)...I'll post the most pro-Bush counties (from the 2000 election) among those otherwise Dem. 500,000+ counties...and I'll post the least pro-Bush counties in the otherwise Repub. counties with less than 5,000 people (and possibly a few other lists). Wherever I post it, I'll provide a link to it in this thread.