Nominations of Dennis Shea and C.J. Mahoney : hearing before the Committee on Finance, United States Senate, One Hundred Fifteenth Congress, second session, on the nominations of Dennis Shea, to be Deputy U.S. Trade Representative/U.S. Ambassador to the World Trade Organization, with the rank of Ambassador, Executive Office of the President; and C.J. Mahoney, to be U.S. Trade Representative for Investment, Services, Labor, Environment, China, Africa, and the Western Hemisphere, with the rank of Ambassador, Executive Office of the President, January 17, 2018.