Were both his parents born in the US? Just askin', 'cause I don't know.
If both his parents were naturalized citizens at the time of his birth, yes he would be. Unfortunately I don't believe this is so, and hence he is not. He is not eligible to serve as president, nor vice-president. He is my senator, but unfortunately he can not run for president. I really like him.
It does not matter.
He was born in the United States.
End of story.