I was reading this post about Republican votes in US and I came across this chart.
It shows the percentage of votes to Republicans in 2000, 2004, and 2008 elections (not 2012 unfortunately). It seems that less education and more salary both increase the chances of voting for Republicans (white voters).
I want to focus on how chart is displayed. It seemed to me a bit confusing or at list no easy to read. So I tried to imitate Hans Rosling and designed this dynamic chart. It shows all the info except standard deviation. I don’t know if it is clearer but the attempt deserves to be here.