In respect of export earnings these exports to the US are not expected to be adversely affected as most of these commodities are sold under long term contractual arrangements.
The story on trade and jobs, in my judgment, is a bit more complex, especially with respect to China, than this strain of conventional wisdom would lead one to believe. If the renminbi were to rise, presumably U.S. imports from China would fall as China loses competitive position to other low-wage economies.