Obama administration responds
White House Press Secretary Josh Earnest said Duterte's recent comments, such as telling Obama to "go to hell," contradicted the "warm relationship" between the two countries.
He cited US recovery efforts after natural disasters as an example of the close ties between the two nations. Earnest also said the US has not received any request from the Philippines to change their bilateral relationship.
But the White House spokesman insisted the US will "not hesitate" to raise concerns about extrajudicial killings in the Philippines, which he said were "entirely inconsistent" with universal values of human rights.
"We won't be silent in raising our significant concerns about these reports," Earnest said.