Since you may have some difficulty proving your point, I will provide you with a research lead.
A person wishing to renounce his or her U.S. citizenship must voluntarily and with intent to relinquish U.S. citizenship:
1. appear in person before a U.S. consular or diplomatic officer,
2. in a foreign country (normally at a U.S. Embassy or Consulate); and
3. sign an oath of renunciation
F. RENUNCIATION FOR MINOR CHILDREN
Parents cannot renounce U.S. citizenship on behalf of their minor children. Before an oath of renunciation will be administered under Section 349(a)(5) of the INA, a person under the age of eighteen must convince a U.S. diplomatic or consular officer that he/she fully understands the nature and consequences of the oath of renunciation, is not subject to duress or undue influence, and is voluntarily seeking to renounce his/her U.S. citizenship.
http://travel.state.gov/law/citizenship/citizenship_776.html
Conclusions drawn from the above: His legal name is Barry Soetoro, and a citizen of Indonesia.
He is not U S Citizen, therefore could not be a Natural Born US Citizen either.
His place of birth was Kenya, but points 1. through 4. above make it mute plus there are several other reasons, below are two of:
His father, Barrack Obama, Sr. was a British (Kenya) citizen, under the historical definition of Natural Born, having a non citizen parent is disqualifying. Also his father, Barrack Obama, Sr. being a British (Kenya) citizen, made Obama,Jr. a British citizen at birth regardless of where born according to an 1948 English law . Ever if he was born in the U. S. he had dual citizenship which also is disqualifying. A side issue: His Mother’s age at his birth, caused a Title 8 US Code legal impediment for filing a request for “Certificate of Live Birth”. This would suggest that this is the reason that such a request has not been released or the original hospital record released. In order to fully resolve his eligibility question all of the following records must also be released. “Full Transparency” as guaranteed during the Presidential campaign is required, if there is nothing to hide why not release? Obama is not a natural born citizen, because his father was not a US citizen. That is if we are to believe that the man he states in his book is his real father!
According to what we know of Obama's father, he was a British subject, and because of that Obama was born a subject of the Crown and later became a citizen of Kenya. Even if he was born in Hawaii, and his mother was old enough to pass US citizenship on to him, he would still only be a citizen-not a natural born citizen. Natural born status must exist at the moment of birth. It can not be earned, or received at a later date, or by a retroactive law. The Constitution does not define what a natural born citizen is. However, if we look at the United States Naturalization Law of March 26, 1790, it states "the children of citizens of the United States that may be born beyond Sea, or out of the limits of the United States, shall be considered as natural born Citizens". So we can learn from this that you have to be the child of US citizens, to be a natural born citizen. Now that law was repealed and replaced by the The Naturalization Act of 1795 which now stated that "the children of citizens of the United States born out of the limits and jurisdiction of the United States, shall be considered as citizens of the United States." This act, signed into law by George Washinton himself, dropped the "natural born" phrase. So from this we can see the only way you can be a natural born citizen, is to be born to US citizens on US soil.
George Romney ran for President years ago, and he had to drop out when it was found that although both his parents were citizens, he was born in Mexico. He was therefore a citizen, but not natural born. The reverse could also happen. Two people sneak over the border, and have their child here. The child is a US citizen, but again he is not natural born, because his parents are citizens in Mexico. The child could also claim dual citizenship, and have loyalty to Mexico and the USA. Also in the 1795 law you can see that to become a naturalized citizen, you had to "support the Constitution of the United States; and that he does absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty whatever, and particularly by name the prince, potentate, state, or sovereignty whereof he was before a citizen or subject. Also if you " borne any hereditary title, or been of any of the orders of nobility in the kingdom or state from which he came, on his, moreover, making in the court an express renunciation of his title or order of nobility".
So you can see that the founders did not allow dual citizenship, for even a naturalized citizen. Children that were born to fathers that never resided in the United States were barred from citizenship at birth. "right of citizenship shall not descend on persons whose fathers have never been resident of the United States." Knowing this, we are now being told that Obama is qualified? Yes, he may be a citizen, though I doubt it, but he was never a natural born citizen, and can not be President, if we honor the Constitution.