washington u.s. republican lawmakers voice deep concern thursday report obama administration might allow iran use dollar business transactions although plan announce u.s. government officials say issue discuss treasury department policy change would involve widespread access iran u.s. financial system dispute media report suggest otherwise obama administration consider ease sanction permit non-u.s. company access u.s. financial system u.s. dollar transactions involve iran say u.s. official speak condition anonymity official say matter study decisions take official knowledge none imminent underlie reason weigh step non-u.s. company able business iran last year nuclear deal find difficult without point touch u.s. financial system official say company get conflict message governments encourage trade iran washington emphasize enforce sanction rigorously republicans remain dead set effort ease restrictions tehran especially light iran recent missile test iran continue undermine spirit nuclear agreement illicit ballistic missile test obama administration go way help tehran reopen business president abandon idea say paul ryan republican speaker house representatives controversy could complicate senate confirmation adam szubin head treasury sanction enforcement arm senate aid say president barack obama nominate szubin april 2015 approve committee month senate leaders try bring szubin vote full senate days late least one senator object aid say republicans control congress try kill international deal iran agree curtail nuclear program exchange sanction relief republicans say oppose szubin support agreement aid say talk ease dollar restrictions could fuel opposition deal opponents seize comment u.s. treasury secretary jack lew sign administration would end ban iran use dollar trade republican representative ed royce say letter obama lew appear house testimony last week leave door open administration allow transactions lew say department look make sure iran get relief nuclear deal rather deny idea consideration current u.s. policy bar foreign bank clear dollar-based transactions iran u.s. bank sanction experts say treasury could issue license allow u.s. bank send dollars offshore facility foreign non-iranian bank could withdraw dollars facilitate legal trade iran allowance would likely bar trade involve blacklist iranian citizens organizations associate press report obama administration might soon tell foreign governments bank could start use dollar instance facilitate business iran cite officials familiar discussions source administration congress tell reuters concession one wide array options might consider state department spokesman john kirby comment washington would continue analyze lift sanction nuclear agreement know jcpoa keep pressure iran areas concern long iran continue meet nuclear commitments continue meet jcpoa commitments sanction lift say republicans alarm talk u.s. may ease iran trade