http://www4.law.cornell.edu/uscode/html/uscode08/usc_sec_08_00001401——000-.html
§ 1401. Nationals and citizens of United States at birth
The following shall be nationals and citizens of the United States at birth:
(a) a person born in the United States, and subject to the jurisdiction thereof;
(b) a person born in the United States to a member of an Indian, Eskimo, Aleutian, or other aboriginal tribe: Provided, That the granting of citizenship under this subsection shall not in any manner impair or otherwise affect the right of such person to tribal or other property;
(c) a person born outside of the United States and its outlying possessions of parents both of whom are citizens of the United States and one of whom has had a residence in the United States or one of its outlying possessions, prior to the birth of such person;
(d) a person born outside of the United States and its outlying possessions of parents one of whom is a citizen of the United States who has been physically present in the United States or one of its outlying possessions for a continuous period of one year prior to the birth of such person, and the other of whom is a national, but not a citizen of the United States;
(e) a person born in an outlying possession of the United States of parents one of whom is a citizen of the United States who has been physically present in the United States or one of its outlying possessions for a continuous period of one year at any time prior to the birth of such person;
And what, exactly, is unconstitutional about that law? The Constitution clearly gives Congress the authority to pass naturalization laws in Section, Article 8.
Its about being naturally born in the USA.
Now post the text as it read in 1961.
(e) a person born in an outlying possession of the United States of parents one of whom is a citizen of the United States who has been physically present in the United States or one of its outlying possessions for a continuous period of one year at any time prior to the birth of such person;
From what I understand of what I've read about the laws pertaining to citizenship status at the time of Obama's birth, his mother could not have conferred "natural born" citizenship status on him, if he were indeed born outside the territorial US.
I've also read that more recent laws about citizenship are not retroactive, therefore, the laws which were in place at the time of Obama's birth are what determine his status.
Obama's mother would have had to have been a citizen of the US for a period of five years after the age of fourteen, for her to have conferred US citizenship on her son, which she was not. She was 18 years of age at his birth.