More difficult than you think.
A US citizen is not necessarily a natural citizen. They are distinct categories of citizenship.
If one is born to a US citizen over the age of consent one is an American citizen. If both parents are over the age of consent and are US citizens the baby is a natural born citizen. Only a natural born citizen, the child of US citizen parents, is able to hold the office of POTUS.
Since one is not considered a citizen until reaching the age of consent it is not possible to transfer citizenship to a child. That is, one must first be a citizen by virtue of reaching at least the legal age of consent to transfer citizenship to one’s offspring. Obama’s mother was a child in the eyes of the law and thus the victim of statutory rape when O was conceived. O is not a legal US citizen either by birth or by place of birth. Much of this is, of course, lost on the legal system.
If you really want to play with the big boys learn to swim in the deep water.
Since one is not considered a citizen until reaching the age of consent it is not possible to transfer citizenship to a child.
Dude, someone pulled that out of their backside. People under the "age of consent" (whatever that is) have citizenship. If they have a parent who is an American, they have American citizenship. Period.