No. I don't. Ever heard about intuition? Didn't you mention "sharp political senses" before?
When brokers are asked why they bought a certain share, they often respond "gut feeling".
Or, let's take chess: How come Gary Kasparov can evaluate a chess position on the fly, but is unable to fully explain his judgement in words?
To summarize, if you cannot explain a decision unambiguously with words or symbols, it ain't fully rational.

If you are willing, I suggest we try to establish an alternative basis for a theory on how politicians act - just as an exploration.

First of all, let's separate the statesman from the politician. For an illustration of a typical politician play in your head the wonderful series "Yes, Minister" (later, "Yes, Prime Minister"). Here we have a person without any understanding in professional areas like finance, health, security - thus being unable to rationally weigh any alternatives and form a meaningful opinion. His asset is a feeling for what the public wants and what rival politicians are concocting - in other words, "sharp political senses".

The statesman, on the other hand, is somebody that has a vision, or at least an understanding of the subjects he is supposed to promote.

So, does our discussion refer to the statesman, or to the politician?