mexico city pressure president donald trump mexico prepare discuss change trade rule product country origin try avoid disruptive fight unite state commerce two countries begin difficult new relationship mexico see possible common grind trump rule origin north american free trade agreement nafta bind two countries canada several source say rule origin regulations set trade products source although formal negotiations nafta begin rule could eventually alter favor u.s. industry competitors outside north america particularly asia change rule could help align mexico trump industrial strategy boost u.s. manufacture job dovetail mexican government call strengthen north american competitiveness could also help pave way broad deal trump border security immigration mexican officials believe talk nafta rule origin important point discussion two countries trump office mexican official say white house official say general rule best interest u.s. insist strong rule origin provision pursue bilateral negotiations lax rule origin propose treaties like defunct trans-pacific partnership shrink weaken supply chain contribute offshoring american job mexican foreign minister luis videgaray economy minister ildefonso guajardo hold talk top trump officials washington wednesday thursday security migration trade discuss fear economic disaster haunt mexico since trump presidency november threaten tear nafta impose protectionist tariff build wall unite state southern border halt illegal immigration mexico reluctant alter 1994 trade accord officials concede change may necessary help keep trade open unite state absorb 80 percent export want maintain free access mexican products without restrictions without tariff quotas videgaray spearhead government outreach trump say monday speak condition anonymity two mexican government officials four people familiar ongoing discussions say mexico saw rule origin important avenue broke deal trump provide fair compromise reach trade agreements content rule rule origin often use determine import duties nafta 62.5 percent material car light truck make mexico must north america able enter unite state tariff free countries agree negotiations percentage could increase potentially give advantage u.s. industry expense asian competitors mexico change rule origin could less evil trump threat impose 35 percent tax certain goods make foreign company mexico sale unite state trump pressure u.s. automakers ford build cars home worry mexico industry one main drivers growth account 18.5 percent manufacture gdp 2015. trump tuesday tell chief executives big three u.s. automakers general motor ford fiat chrysler want see auto plant unite state mexico warn could pull nafta renegotiation pact benefit trump team behind push change origin rule see mean reduce import china two mexican source familiar matter say trump nominee commerce secretary wilbur ross speak importance content rule protect automotive industry senate hear last week canadian media report ross tell canada rule origin would central nafta talk nafta rule origin apply goods make three countries two mexican source say trump administration could push national content requirements would ensure unite state benefit change rule origin nafta region whole however would complex manage add hurt company change would need phase gradually items target tricky negotiations would one source say deal would need ensure rule change apply countries mexico one mexican official say foreign carmakers mexico toyota might able handle high nafta content ratio good others camry car example high north american u.s. content japanese automakers mazda large proportional reliance asia-based suppliers kristin dziczek labor analyst center automotive research say deepen rule origin could impact u.s. job would hit foreign automakers hard especially produce part vehicles outside north america nafta rule place prevent china low wage countries able produce majority content vehicle export another country assemble without pay tariff u.s. automakers back tough rule origin previously want flexibility source part pressure trump mexico ready discuss nafta rule u.s. talk