That is always your guys defense "just assembled". It is like you guys are looking for a tractor 100% made in the U.S with U.S parts...which you should all know is pie in the sky thinking. The level of assembly and production that takes place in Augusta is far greater than what other companies do in the U.S (were they just place tires and loaders on their tractors).
If we think a Ford truck that comes out of the Dearborn plant is "built" in the USA then the JD's that come out of Augusta are "US" built. We export tractors all the time, you ask the rest of the world where these tractors are built and they will tell you "U.S.A".
In the case of the Ford F-150, made in Claycomo MO: or Dearborn Mich a lot of it was made in the US. To see where your vehicles engine and drive train was made visit this site: Cars and Trucks That Are Built in the United States - Interactive Graphic - NYTimes.com