(And would you agree that today's parallels for the Blues and the Greens would be the Blacks and the Greens?)
I was thinking more along the lines of blue States and red States, with the Blues being the Democrats, and the Greens being the, well, Greens and other radicals.
You have to wonder how much America would be improved if suddenly we had 30,000 fewer ultra leftist radicals. There would certainly be a lot of academic positions opening up in the universities.