mexico city bid u.s. president donald trump deport non-mexican illegal migrants mexico enrage mexicans top agenda officials countries meet thursday amid deepen rift two nations u.s. government tuesday say would seek deport many illegal immigrants mexico enter unite state regardless nationality prompt fiery response mexican officials call measure unilateral unprecedented mexican foreign minister luis videgaray say new immigration guidelines would top agenda meet mexico city u.s. secretary state rex tillerson homeland security secretary john kelly stake high unite state since mexico warn breakdown relations could affect extensive cooperation fight narcotics stem flow central american migrants reach u.s. border talk point senior official show mexicans plan seek information trump executive order summit officials plan say worry consequences mexican nationals unite state note show part response videgaray say mexico foreign ministry would get involve legal case unite state consider right mexicans violate mexican government take measure legally possible defend human right mexicans abroad especially unite state videgaray say visit include meet mexican president enrique pena nieto well military finance interior officials suppose focus border security law enforcement trade accord state department hop thaw relations low series botch meet last month deepen tensions historic ally relationship ... historic low would wishful think assume new concrete agenda items advance come point jason marczak director atlantic council latin america economic growth initiative say pena nieto abruptly cancel plan january summit trump real estate mogul suggest mexican leader come refuse pay border wall trump sign first executive order punish sanctuary cities build wall could cost around 21.6 billion first time videgaray travel washington negotiate counterparts last month trump also threaten rip key trade deal unite state mexico renegotiate favor american interest tuesday guidance also call hire 15,000 immigration agents subject immigrants show country two years expedite removal past unite state struggle fill vacancies thank rigorous vet requirements deportation spat overshadow trump envoys talk angry mexico