Um...
I'm American, but so are lots of people whose ethnicity is Chinese, African, what have you. So I picked "other." Because I'm also a wise-ass (I know perfectly well what you meant by "American.")
You askin' if I'm Caucasian? Because they don't come much whiter than me. Wonder Bread. Slug White and the Seven Dwarfs. Fightin' Whities.
Dull as dust.
Ok, seriously now, my antecedents were primarily from England, but there's a little bit of French (my dad was the result of a youthful indiscretion with an exotic Frenchman, or so the story goes... everyone else is English). There's also some German tossed in if you go back far enough. More recently, say 3 generations back, the folks came from Prince Edward Island, Canada and from the Berlin, New Hampshire area. And about 7 generations back I have a common ancestor with (are you ready for it?
wait...
you won't believe this... )
George Bush.
(P.S. harry... China IS part of Asia

) We do such a fine job teaching geography in this country...