Election 2004 Results

Robert J. Vanderbei


The changing colors of America (1960-2004)

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Using County-by-County election return data from USA Today together with County boundary data from the US Census' Tiger database we produced the following graphic depicting the results. Of course, blue is for the democrats, red is for the republicans, and green is for all other. Each county's color is a mix of these three color components in proportion to the results for that county.

Counties shown in black represent either missing election data or a mismatch between the US Census data and the USA Today data. For example, the New England states' election return data is given for each municipality and/or district rather than for each county. Hence, it couldn't be easily matched with the county boundaries.

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