Another electoral map

I’ve always wondered why the color for the Demos is blue, and that for the Republicans is red. Red is the color of Communism, and since Demos are quasi Communists, shouldn’t the colors be the other way round?

Here is another electoral map by David Leip, finally one who gets the colors right. (Hat tip: Jim Geraghty, aka Mr. KerrySpot of National Review Online.)