The question it raises in my mind is not one legality.
The question I have is whether or not he used foreign status to get accepted into his schools.
Colleges love having foreign students and will give them preferential treatment in terms of financial aid and acceptance in order to enhance the diversity of the school.
Now, a young child, born in one country and adopted by another from a different country has no control over his citizenship. I think that argument is a non starter.
However, a college graduate who is looking to get into a prestigious Ivy league Law school declaring himself “foreign” to gain a personal advantage is a very different thing. It would be something that a silly kid might try to save some money. But it shows a contempt for his birth country, and quite frankly, a complete disrespect for his adopted country. It is the type of “illegal immigrant benefits” argument that would cause him a lot of trouble.
In short, it would show him to be a liar to the point where it would cost him dearly. It would show that he willfully manipulated the system for his own benefit.
That would be interesting to see him explain away.
The other “birther” arguments are non starters and would not really get anyone, anywhere.
That's actually not true. Foreign students generally don't get aid and have to pay full price. As far as diversity is concerned, what matters to colleges is racial diversity. that is, they want to have a large non-white, non-Asian percentage in the student body, so for this purpose, an American black or Latino student is just as good as a foreign one.