. >> reporter: so there is as far as you can go without provoking a war? >> yep. >> reporter: president trump is in da nong, vietnam as a part of his trip to acia. he spoke to business executives at the asia-pacific economic cooperation sum. he told the ceos the united nations has not been treated fairly in international trade. now the president said the u.s. will set trade policy under the guideline of america first. so far in asia, president trump has been getting fairly positive reviews. he's looked presidential and he didn't, despite some early concerns, trigger a trade war with china or a nuclear war with north korea. i spoke earlier with a source who has direct knowledge of the details of the trip. he told me the president's advisers worked lard to tone down the speech he made in south