washington president-elect donald trump plan renegotiate north american free trade agreement nafta make lot good u.s. workers would one-way street administration canada mexico prepare list demand could require difficult u.s. concessions 22-year-old nafta trade deal become lightning rods voter anger u.s. industrial heartland state sweep trump power month trump monday vow file notice intent quit asia-pacific trade deal first day office pledge leave nafta improve like say little improvements want apart halt migration u.s. factories job mexico trade experts academics government officials say canada mexico would also seek tough concessions nafta zero-tariff rate would extremely difficult alter renegotiation would likely take several years renegotiation one side come request side go expect concessions say wendy cutler former deputy u.s. trade representative ustr need know go ask give cutler help renegotiate stall trade deal south korea 2010 ustr concessions u.s. automakers expense long phase-out steep korean pork tariff allow korea largely maintain health care reimbursement system favor domestic generic drugmakers trump campaign call nafta bad trade deal ever threaten levy 35-percent tariff mexican-assembled autos goods would hard time raise u.s. tariff without scrap agreement trade experts say precedent free trade negotiations one side raise tariff say chad bown senior fellow peterson institute international economics washington u.s. workers expensive mexican workers way level play field things raise cost mexico bown say negotiate strong environmental labor protections would one way would increase manufacture cost lower-income country like mexico trump transition leader trade dan dimicco decline reuters request comment dimicco consideration trump top trade negotiator former chief executive steel giant nucor corp. long fight protections unfairly trade import youtube video message publish monday trump vow quit trans-pacific partnership tpp propose 12-country pacific-rim trade bloc although tpp term settle year ago pact never take u.s. republican leaders congress due part anti-free-trade rhetoric presidential campaign call potential disaster country trump say administration would instead negotiate fair bilateral trade deal bring job industry back onto american shore comment would appear snuff hop among tpp countries pact champion president barack obama could revive new administration mexican president enrique pena nieto say pacific rim summit saturday would will discuss nafta trump modernize treaty renegotiate exist provision say modernization could include add environmental labor provision contemplate nafta negotiate early 1990s canadian prime minister justin trudeau meet pena nieto apec sideline say keep options open trade discussions u.s. president-elect nafta reopen canada insist renegotiation bring end decades-old dispute canadian export softwood lumber say david macnaughton canada ambassador unite state u.s. producers claim canadian wood unfairly subsidize come federal land threaten seek billions dollars tariff canadian officials say would make mockery free trade mexico part concessions would favor u.s. industrial goods could meet demand increase u.s. import quotas mexican sugar protections mexico potato crop mexico canada would likely demand great access compete u.s. public sector procurements largely protect buy america laws major trump administration infrastructure spend program would make entice target cutler say since nafta enact total u.s. trade canada mexico quadruple 1.3 trillion year u.s. combine goods trade deficit canada mexico grow 9.1 billion 1993 76.2 billion 2015 graphic show trend u.s. trade deficit import tmsnrt.rs/2gajlsa nafta effect u.s. job dispute critics left-leaning economic policy institute charge lead loss 850,000 u.s. manufacture job proponents u.s. chamber commerce claim trade growth add net million job unite state non-partisan congressional research service conclude nafta small positive effect u.s. growth help u.s. manufacturers become competitive due efficient supply chain renegotiate nafta could ironically end borrow key elements tpp stiffen provision environment labor digital economy standards trade experts say mexico canada already agree tpp fully enforceable labor environmental improvements mean punitive duties could impose countries comply major step-up nafta tpp also include provision govern e-commerce cross-border data flow sectors barely exist nafta negotiate early 1990s good protect intellectual property ensure free open internet officials three countries say nafta need modernization area trump economic advisers peter navarro wilbur ross suggest however tpp environmental health safety standards strong enough economic white paper various opinion piece navarro university california-irvine business professor ross billionaire private equity investor consider trump lead commerce department say want future u.s. trade deal include prompt trigger automatic renegotiation trade gain distribute fairly also want ironclad sanction currency manipulation zero tolerance intellectual property theft negotiation renegotiation guide principle enter free trade agreement increase total trade reduce trade deficit write trump 's nafta revamp would require concessions may borrow tpp