"... natural born Citizen..."

"No Person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President... "
[U.S. Constitution, Article II, Section 1]

Second apparition:
Be bloody, bold, and resolute; laugh to scorn
The power of man, for none of woman born
Shall harm Macbeth.
...
MacDuff:
Despair thy charm;
And let the angel whom thou still hast served
Tell thee, Macduff was from his mother's womb
Untimely ripp'd.
[Macbeth]

Perhaps we ought ask of each presidential candidate,

"Were you delivered by Caesarian section?"

If "yes", you are NOT "natural born".