Politics is odd. On one hand I can see the system of the USA [the USA Constitution] as making sense. But the thing that is puzzling about it is that it does not seem to have come about by any kind of logical analysis. [Though I used to think that John Locke had a lot to do with it, but that no longer seems to be the case.] Rather it is a basic development of English Law. Mainly the Magna Carta and the issues that came up in England with James II. [The Glorious Revolution]. The way it looks to me is that the English simply saw the problems with pure Parliamentary power, not some super intuition about the value of King and Parliament. Same with the house of Lords and Commons. It does not seem to have some deep philosophical analysis behind it.
To me it might make sense to understand why the USA Constitution has worked so well until now, and why things seem to be going haywire.
To see how the English System developed, you need to learn about Edward I, the struggles of the later kings, [John I, Henry II][See the provisions of Oxford.], not the slightest bit of philosophic analysis. Zilch. Then you want to get to the American Constitution, you simply transplant the English System onto American soil, then change a few minor details.
Yet the result is the most astounding system and balance or freedom with responsibility that the world has ever seen. Compare that with the logical rigorous analysis of Das Capital which results in gulags and mass starvation. You can not help and see that fundamental law of Physics: no matter how logical and rigorous a system is, if it does not agree with experiment, then t is wrong.