The height of the blocks appears to be county population.
Not density, and this creates some deception. Maricopa County looks voluminous, while urban counties having just as large population look spindly and less important if their county area doesn't include all that rural land. The map could be improved by making the Z axis equal to population density.
What about the great Alaskan plateau up there? There can't be a high population density there.
The height of the blocks is the MARGIN in total votes. So, a very populous county that is close (Cincy, Ohio; or Louisville, Ky) will not stick up very far, either red or blue. The huge towers are Dem areas with lots of people (and they're not all fraudulent, by any means-- don't make the same mistake as the Dem loons. There are a lot of people who disagree with us, and that's where they are). The GOP areas with few voters are red, but with little height. Where Bush won the election was in the "low bumpy" red areas -- Big GOP %, and a fair number of voters.