note paragraph contain strong language might offend readers arshad mohammed jeff mason washington/tampa u.s. state department democratic presidential candidate hillary clinton tuesday stress need tie philippines base mutual respect manila new leader raise worry future key alliance call president barack obama son bitch despite u.s. dismay duterte remark current former u.s. officials play impact say expect serious damage tie time high tensions china extensive territorial claim asia state department say plan first meet obama counterpart rodrigo duterte sideline regional summit laos tuesday cancel tone philippine leader rhetoric raise question chance productive talk word matter want see atmosphere cordial open strong cooperation state department spokesman mark toner tell regular news brief washington clinton secretary state architect obama policy emphasize importance asia pacific u.s. interest face rise china say obama right cancel meet president philippines insult president appropriate low-key way say sorry meet tell reporters campaign plane lot tie unite state philippines think important relationship certain level respect expect side clinton say duterte make remark obama explain would lecture extrajudicial kill war drug launch since take two months ago kill 2,400 people previously call pope son whore u.s. ambassador gay son whore philippines voice regret duterte comment obama cancel formal bilateral meet white house say obama might speak duterte informally duterte volatile nature threaten complicate washington tie close ally southeast asia try forge unite front region response china extensive claim strategic south china sea philippines central effort due international court case bring beijing march unite state philippines agree five locations u.s. military facilities country new security deal deal grant washington increase military presence former colony rotation ship plan humanitarian maritime security operations ask duterte comment u.s. secretary defense ash carter say defense relationship philippines strong longstanding one speak reporters carter also describe philippines new defense minister delfin lorenzana someone knowledgeable things together official u.s. state department say government government relations manila remain strong areas believe robust strong cooperation go simply throw aside official note duterte new national leadership serve city mayor maybe feel way new job official say former u.s. officials say china would please u.s.-philippines friction time tell whether president duterte step back episode realize need recalibrate choice word engage u.s. leaders say amy searight former senior pentagon official washington center strategic international study think tank evan medeiros obama former top asia adviser senior analyst eurasia group saw row speed bump road block u.s.-philippines tie unfortunate fundamentally derail relationship say insult u.s. clinton call duterte show respect