This scatterplot shows how the pro-gun NRA and the pro-gun-control Brady Campaign rank U.S. senators. The size of the dot is proportional to the number of senators; hover over to see them. Not surprisingly, there's a strong negative correlation.
Each scatter dot is actually a pie chart, but I am saved from the wrath of the datavis gods by political polarization: there are no Democrats and Republicans that share a stance.
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