Post Turtles

While stitching a cut on the hand of an old local farmer, the doctor struck up a conversation.
Eventually the topic got around to politicians and their role as our leaders. 
The old rancher said, "Well, as I see it, most politicians are 'Post Turtles'.''
Not being familiar with the term, the doctor asked him what a 'post turtle' was.
The old rancher said, "When you're driving down a country road and you come
across a fence post with a turtle balanced on top, that's a post turtle."
The old rancher saw the puzzled look on the doctor's face so he continued to
explain.
"You know he didn't get up there by himself, he doesn't belong up there, he
doesn't know what to do while he's up there, he's elevated beyond his
ability to function, and you just wonder what kind of dumb ass put him up
there to begin with."
Best explanation of a politician I've ever heard.