A Natural-Born President
One of the constitutional requirements of the job is be a "natural born" U.S. citizen.
It would be kind of screwed up that children born to foreigners illegally in this country could be eligible to be president but that the children of U.S. military officers posted outside the country are not.
I bet the McCain campaign would love this to be made an issue by his Democratic opponent. Not even Democrats are that dumb.
UPDATE: Here's hoping we find out that Mrs. McCain had a C-section so that the McCain's opponents start attacking for being a Caesarean.