unite nations president donald trump take world stage unite nations first time week share spotlight envoy nikki haley emerge surprise public face u.s. foreign policy haley 45-year-old former south carolina governor prove high-profile member trump administration time overshadow secretary state rex tillerson former chief executive exxon mobil corp despite lack previous foreign policy experience diplomats say u.s. nikki haley remarkable hard find trump administration someone approachable politically assertive say senior european diplomat speak condition anonymity see potentially take tillerson point clear long-term objective presidency diplomat say haley dismiss speculation could replace tillerson country top diplomat time publicly differ trump president eight months white house sunday tell cnn tillerson go anywhere continue work well him trump speech tuesday u.n. general assembly high profile opportunity explain foreign policy vision couch america first agenda haley arrive 193-member world body january pledge take name ally washington back trump administration officials say president happy performance view tough smart speak regularly haley fellow republican one u.s. administration official say twice five weeks persuade 15-member u.n. security council unanimously boost sanction north korea blunt language raise eyebrows among diplomats time careful steal limelight trump wealthy businessman former reality television star personally think slap right people hug right people come u.s. strong end haley tell white house reporters friday european council foreign relations u.n. expert richard gowan say haley success could make trump nervous would bad deal ask replace tillerson secretary state would lose independence enjoy new york would tie closely president agenda offer could refuse irony one way trump hurt haley promote say haley credit trump u.s. achievements unite nations security council toughen sanction north korea month praise strong relationship chinese counterpart result dismiss sept. 11 u.n. resolution weaken china russia another small step big deal haley jump defense dismiss suggestion page go go look small compare say time haley make mark also fight describe u.n. anti-israel bias push u.n. reform amid trump call slash u.s. fund accuse iran meddle middle east challenge russia ukraine support syrian president bashar al-assad senior administration official speak condition anonymity say national security council meet iran month trump specifically ask haley opinion strategy pursue give opinion like point view official say afraid speak up senior iranian official speak condition anonymity say lady reason angry iran selection ambassador haley make national headline governor lead successful effort remove confederate battle flag view many racist emblem ground south carolina state capitol kill nine black churchgoers state 2016 presidential campaign haley spar trump back one rival become republican candidate daughter immigrants india haley take trump task harsh campaign rhetoric illegal immigration speak forcefully enough white supremacists last month trump inflame tensions say counter-protesters also blame deadly rally white nationalists virginia haley speak tell u.s. media personal conversation without name trump write staff u.s. mission unite nations say everyone must stand condemn hate trump nikki haley share u.s. spotlight u.n. gather