washington trump administration may undertake trade action protect u.s. semiconductor shipbuilding aluminum industries cite national security concern commerce secretary wilbur ross tell wall street journal interview tuesday say industries could qualify protection section 232 trade expansion act 1962 let president impose restrictions import reason national security use launch probe steel import journal report last week president donald trump launch trade probe china exporters cheap steel u.s. market raise possibility new tariff ross say trump administration might intercede aid toshiba corp u.s. unit westinghouse electric co file bankruptcy last month company file bankruptcy protection incur billions dollars cost overrun four nuclear reactors construction u.s. southeast bankruptcy cast doubt future first new u.s. nuclear power plant three decades ross say renegotiate north american free trade agreement complete end 2017 journal report ross tell newspaper talk mexico canada go much beyond december would difficult get pact ratify mexico mexico due hold presidential election july 2018. ross say trump administration consider restart talk bilateral trade deal european union china obama administration begin never finish journal report add say unite state might reopen bilateral deal south korea early month u.s. vice president mike pence tell business leaders seoul trump administration would review reform five-year-old free trade agreement two countries pence say u.s. trade deficit double five years since u.s.-south korea free trade agreement begin many barriers u.s. businesses country u.s. commerce secretary eye trade move wsj