"I, Robert Bowdrie Bergdahl , do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; and that I will obey the orders of the President of the United States and the orders of the officers appointed over me, according to regulations and the Uniform Code of Military Justice. So help me God."
He was following the implicit orders of the President, who was, and continues to be an enemy islamist pig-dog. Then an ILLEGAL poser to that position.
The meeting with bergdahl’s parents, and the release of five hardened islamic terrorists for this POS proves at least the first part.