I have seen so little verifiable proof from Obama on who he really is and virtually no solid objective judicial or scholarly interpretation of the Constitution’s intended definition of a "natural born citizen" I cannot say whether he is "legal" or not. All the information he has spent millions to keep us from seeing should just be part of a normal background check in a situation like this but anyone who asks is simply called a “birther nut” and the mystery lives on. Many capitulate and simply avoid being attacked by simply saying, "forget about it, let's move on".
Just knowing the types of hideous people he has been close to throughout life, makes one wonder what he is hiding.