It may very well be assembled here stateside... but that dosn't mean the parts are also made here.
Which raises a curious question, when they label avehicle as say 77% domestic made, how is that really quantified? something like, say, a wiper control assembly, which itself has lots of little parts, may be installed here, and maybe even that assembly is, er, assembled here, but chances are slim that all the little components came from the same place or that many of them are not from other countries.