washington president donald trump vow respond fire fury north korea persist threaten unite state catch foreign policy military aid surprise two administration officials direct knowledge issue unfold say wednesday president trump comment unplanned spontaneous say senior administration official deal korea issue request anonymity comment trump say another administration official like first request anonymity officials say trump know off-the-cuff remark run language senior aid beforehand event tuesday topic americans over-using opioids trump say north korea best make threats unite state meet fire fury like world never see u.s. officials analysts caution engage rhetorical shout match pyongyang turn say consider strategy fire missiles u.s.-held pacific island guam military air base white house push back wednesday say general john kelly trump chief staff others national security council team well aware tone statement president prior delivery word tone strength message discuss beforehand spokeswoman sarah huckabee sanders say new jersey trump one golf course work vacation sanders say kelly others clear president go respond north korea threats follow sanction strong message uncertain term two intercontinental ballistic missile test pyongyang last month u.n. security council impose new sanction north korea could slash annual export revenue third pyongyang warn ready teach unite state severe lesson senior administration official deal korea issue tell reuters discussions escalate rhetoric response north korean leader kim jong un statements possible effect say official speak condition anonymity nevertheless important north koreans understand country strategic patience exhaust resolve defend ally whatever require not privately two u.s. officials also speak condition anonymity say president threat fire fury helpful threaten evoke undesirable response north korean leader also risk alienate u.s. ally japan south korea well adversaries china russia washington want help pressure kim abandon pursuit robust nuclear arsenal capable strike continental unite state wednesday trump appear temper comment express hope u.s. nuclear arsenal would never need use senior administration officials find different ways explain trump fire fury remark secretary state rex tillerson appear play tough talk say trump try send strong message language north korea leader would understand seem understand diplomatic language speak reporters land guam previously plan trip wednesday say imminent threat north korea americans sleep well night contrast defense secretary jim mattis use strong language yet north korea warn pyongyang must stop action would lead end regime destruction people say north korea action would continue grossly overmatched would lose arm race conflict initiate state department say white house state department department defense speak one voice state department press secretary heather nauert say trump tillerson speak hour president make fire fury comment sing hymn book nauert say trump 's 'fire fury north korea remark surprise aid officials