Actually, he states that in arguendo as a best case scenario for Obama and a worst case scenario for his cause.
The fact is that none of us are sure, at this point in time, where Obama was born. If he were born in Hawaii, then it would be correct to say he had dual nationality at birth. However, if he were born in Kenya, he would have British nationality at birth but not American nationality at birth.
Leo stated in the article, ‘For argument sake, I will assume Mister Obama was born in Hawai’i.’ If BArry Soetoro was actually born in Kenya, he would be ONLY a British subject at birth since his mother had not reached the magic five yeasr past fourteen.