 Zero is the answer. This new official act of immunity now lies like a loaded weapon for any president that wishes to place his own interests, his own political survival, or his own financial gain above the interests of the nation. The president of the United States is the most powerful person in the country and possibly the world, says Sonia Sotomayor. When he uses his official powers in any way, under the majority's reasoning, he will now be insulated from criminal prosecution. That's not even true. If he uses his powers in improper ways that are outside of his core official position...