What's more American? By Vegas Art Guy

I was listening to music via digital cable this morning and somethings been bugging me all day.
What's a more American form of music? Jazz or Blues? They're uniquely American and have a long history to back it up.

Can you help an art guy out here?

Which is it and why?

Now before you start typing asking why I didn't include rock in this discussion I have two words for you...

British Invasion

And I don't want to hear about country music either so don't bother...