Thomas Ferguson has developed an interesting take on American politics. In this short clip (audio is poor, so turn your sound up) he briefly explains the difference between the two parties. Contrary to my contention, he says there really is more than a dime’s worth of difference between them: Each party is backed by different investors.
I have seen evidence to undermine this theory – the switching back and forth that Wall Street investment houses do. They ride the tide, going with whichever party is likely to win, or both in uncertainty.
Nonetheless, his theory is well-developed and goes back many decades in time. It is explained more fully in this clip.