Earthly Mission

How the US Congress Got Polarized Over The Past 60 Years

Partisan polarization has undoubtedly transformed US politics in recent decades, and the effects are especially visible in Congress. In 2015, a group of researchers published network diagrams for each House of Representatives from 1949 to 2011. They drew dots for each representative, as well as lines connecting pairs of representatives who voted together a given number of times. Finally, the dots for each representative were placed according to how frequently the Representatives voted together overall. The change over the past six decades is remarkable:

 

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