post turtle"

while suturing a cut on the hand of a texas rancher whose hand had been caught in a gate while working cattle. the dr struke up a conversation with the old man. eventually the topic got around to obama and his bid for presidency.
the old rancher said, well you know obama is a "post turtle".
not being familiar with the term the doctor asked, what is a post turtle? The old ranchers asid, when you're driving down a country road and you come across a fence post with a turtle balanced on top, thats a post turtle. The old rancher saw a puzzeled look on the doctors face, so he continued to explain you know he didnt get up there by himself, he sure as heck dosent belong up there, he dosent know what to do , while he is up there and you just wonder what kind of idiot put him up there in the first place..