https://ocw.mit.edu/courses/17-251-congress-and-the-american-political-system-i-fall-2016/resources/17-251f16-2015midtermgraph/
17-251F16-2015MidtermGraph.jpg | Congress and the American Political System I | Political Science |...
A graph drawn by the professor for use in the 2015 midterm question.
and the