Map showing the results of the 2004 U.S. presidential elections based on county-by-county results, with the color of the county reflecting whether the county was won by Republicans or Democrats. Notice that most of the country appears red, which reflects that lower-density areas tend to vote Republican.
Image courtesy Michael Gastner, Cosma Shalizi, and Mark Newman
Image courtesy Michael Gastner, Cosma Shalizi, and Mark Newman