Duterte has previously said he wants US troops out of Mindanao because their presence stokes tensions on the island where Islamic militants have waged a decades-long separatist insurgency.
Duterte iepriekš ir paziņojis, ka vēlas, lai amerikāņu karavīri atstāj Mindanao, jo to klātbūtne uzkurinot islāmistu ekstrēmistus darbībai.