This astonishing chart shows how moderate Republicans are an endangered species

By Christopher Ingraham


Political scientists have known for years that political polarization is largely a one-sided phenomenon: in recent decades the Republican Party has moved to the right much faster than Democrats have moved to the left. As Thomas Mann of the Brookings Institution has described it, "Republicans have become a radical insurgency—ideologically extreme, contemptuous of the inherited policy regime, scornful of compromise, unpersuaded by conventional understanding of facts, evidence, and science; and dismissive of the legitimacy of their political opposition."

The data backing this claim up are pretty solid. The most widely-used measure of political polarization, a score of ideology based on voting developed by Kenneth Poole and Howard Rosenthal, has shown that the Republicans in the Senate and especially the House have drifted away from the center far more rapidly than Democrats. The chart below, taken from the most recent slice of their data released just last month, illustrate this pretty clearly:

More: http://www.washingtonpost.com/news/wonkblog/wp/2015/06/02/this-astonishing-chart-shows-how-republicans-are-an-endangered-species/