Infochimps.org has just published a great interactive map of newspapers official presidential endorsements for the 2008 US election (here’s infochimps’ associated blog post about the map). When you hover over the dots, the map presents both the 2004 and 2008 endorsements along with the name of the publication and its circulation (the larger dots on the map also indicate larger circulation size). The overwhelming blue on the map may provide fuel to those who decry a liberal media bias, but a great deal of the blue dots have a darker blue circumference, which indicates that those newspapers endorsed Bush in 2004 but now endorse Obama. There are a few red dots with darker red circles, too, indicating papers that endorsed Kerry in 2004 and now endorse McCain. Rather than illustrating a red state/blue state dichotomy, the graph’s creators suggest that it clearly displays an urban/rural split in the electorate, as illustrated in the cartogram below which assigns hues between red and blue to counties based on a percentage of votes to Democrats and Republicans and distorts the map by relative population size.