washington senior trump administration officials say sunday unite state commit remain part iran nuclear accord despite president donald trump criticisms deal warn might pull nikki haley u.s. ambassador unite nations say tehran comply 2015 nuclear accord intend increase iran accountability return lift economic sanction think right go see us stay deal haley tell nbc meet press speech friday trump lay aggressive approach iran say would certify comply nuclear accord despite determination unite nations nuclear watchdog tehran meet term republican president throw issue u.s. congress 60 days decide whether reinstate u.s. sanction warn able reach solution work congress ally agreement terminate far none signatories deal britain france germany russia china iran european union cite serious concern leave unite state isolate meet press interview haley say unite state say iran breach agreement raise concern activities cover pact include weapons sales sponsorship militant group hezbollah haley say countries turn blind eye iranian activities order protect nuclear agreement say unite state need weigh proportionate response tehran action world stage goal end day hold iran accountable haley say interview mainly focus joint comprehensive plan action nuclear deal formally know haley u.s. secretary state rex tillerson hammer away need address see shortcomings two-year-old international accord simultaneously place pressure rein iranian activities outside scope deal tillerson allude signatory countries opposition reopen iran pact raise possibility second agreement run parallel exist one among areas concern mention sunset provision tehran ballistic missile program haley also say reason unite state look closely iran nuclear deal escalate tensions north korea nuclear weapons development say iran let become next north korea friday trump also say authorize u.s. treasury sanction iran revolutionary guard sunday treasury secretary steven mnuchin say plan move ahead mnuchin interview fox news sunday morning futures say speak iran counterparts attend world bank international monetary fund meet recent days provide detail possible sanction u.s. senator susan collins appear abc week note trump could take extreme step withdraw agreement word support trump moderate republican lawmaker say instead put spotlight two trouble deficiencies agreement refer lack limitations iran test ballistic missiles pathway develop nuclear weapon road many u.s. ally strongly criticize trump decision recertify iran deal israeli prime minister benjamin netanyahu praise move say current term iran nuclear accord would allow nuclear stockpile within decade allow rogue regime 30 time size north korea economy nuclear arsenal netanyahu say cbs face nation u.s. officials try ease concern trump may quit iran deal