lol.
If Obama's father is not a natural-born citizen than neither is Romney's....
Obama's father was not even a US citizen, let alone natural-born. Whether Romney's father was natural-born is questionable since he was born outside US territory, to parents who were US citizens, but not US residents, tho my opinion is that George was natural-born.
So are both Mitt and Barack. You have to have a fairly xenophobic interpretation of natural-born that does not take notice of the XIVth Amendment to exclude either, tho under some of those Barack would be excluded while Mitt was not.