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The added data on the supreme court is presented in an odd way. On the x axis we have justices not years.
A more logical presentation would be solid red as the Supreme court had a majority of Republican appointed justices in each of the past 8 years.
My suggestion is horizontal stripes. mostly red with 2 blue horizontal stripes (or is it 3 ? I'm so ignorant I don't remember who appointed Stevens) showing a constant Republican majority.