The flip-flop is a moral impugnment, almost always issued by those whose code of ethics was first set in stone on Mt. Sinai and remains just as static today. The only problem is, human beings are not static or etched in stone.
It's not just the left questioning Obama's principles over the FISA flap. His opponents are pointing and laughing at him for being a panderer and accommodationist. And Obama hasn't even voted on the bill yet!