I added one more point to my equation of states for election using the result of US 2012 presidential election.
More explanation of this figure can be found in the previous post.
More explanation of this empirical relation can be found in the following draft a few years ago:
I also designed a homework problem for a course on physical chemistry four years ago:
The goal is to understand this empirical relation through the ensemble theory of statistical mechanics. Hopefully, students can have a better understanding between microstates and macrostates, and also the concept of equation of states.