washington president donald trump nominee u.s. trade representative say tuesday believe china substantially manipulate currency past gain trade advantage unclear beijing still past judgment china substantial currency manipulator think lose lot job unite state robert lighthizer tell senators confirmation hear whether china manipulate currency right weaken another question lighthizer say add u.s. treasury secretary steven mnuchin would person make determination trump pledge campaign declare china currency manipulator first day administration move would trigger demand bilateral negotiations issue do china past year spend hundreds billions dollars foreign exchange reserve prop value yuan face capital outflow pressure ustr nominee unclear china still manipulate currency