Many of us have seen the electoral maps of the 2004 election in which each county is labeled red or blue based upon how their county voted. It paints a picture of a divided nation all going our own way. In this paper here, a statitician did a number of drawings of the U.S. where sizes of states or counties is based on variables like population. Even more interestingly is a picture at the bottom where each county is shaded blue, red, or purple, based upon the percentages of votes Democratic or Republican. What you clearly see however is that pure red and pure blue is the exception, only occurring in certain pockets, while the vast majority of counties are a lovely purple.
Here's the link. Oh, it's an Adobe pdf Acrobat file, so you will need one of the Adobe readers.
I don't expect anyone to read the statitician's paper, but you might find the figures and captions interesting. At least, I didn't read the whole paper.