OK, prove it.
Name a fact that has been ignored.
The fact that the man you call Barack Obama has not provided any relevant documentation that he is a natural born citizen of the United States, even in the face of grave doubts about the facts of the case.
In spite of the fact that his refusal to provide such documentation and put such doubts about his legitimacy to rest greatly damages the office he claims and the credibility of every act that is taken in his name.