Blue vs. Red...

For the past 100 years or so, U.S. politics have been essentially a contest between two political parties: Republicans and Democrats.  While other parties and independent candidates have most certainly run, not one of them has ever achieved even political importance, much less dominance.

The “movie” below shows graphically which parts of the country voted for Republicans (red) and for Democrats (blue).  The saturation of the color represents the degree of dominance.  The movie starts around 1920 and ends in 2008.  It would be interesting indeed to see this movie extended to include the 2010 elections!