According to another thread I looked up, his father may have been born in a Mormon colony in Mexico.
He has no established father...only suspects.
“may have been born”
NY Slimes says, “was born”: http://www.nytimes.com/1995/07/27/obituaries/george-romney-dies-at-88-a-leading-gop-figure.html
It doesn’t matter where his father was born. It only matters if his father was a citizen when he was born.
I heard he was conceived on the back of a 10 speed bike