Obama learned about the insult as he emerged from the Group of 20 summit in Hangzhou, China. At a news conference, he said he had told his aides to speak with Philippine officials "to find out is this, in fact, a time where we can have some constructive, productive conversations," signalling clearly that the meeting would not proceed as planned.

"I always want to make sure that if I'm having a meeting, that it's actually productive and we're getting something done," Obama told reporters. Instead, Obama now plans to meet South Korean President Park Geun-hye on Tuesday, said Ned Price, spokesman for the White House National Security Council - a meeting where the response to North Korea's latest missile tests is expected to be on the agenda. Obama arrived in Vientiane just before midnight on Monday, for the first visit by a sitting US president to Laos, where he wants to begin to address the legacy of US bombing during the Vietnam War. He was set to give an address on the importance he has placed on Southeast Asia in his foreign and economic policy during his two terms in office, which will end on Jan. 20, setting the stage for three days of meetings with regional leaders.
G20 Summit: 'This Is Our Country!', Says Chinese Official To Barack Obama's Aide
The White House had earlier said Obama did not plan to pull any punches on his concerns about human rights abuses in the Philippines, its treaty ally, when meeting Duterte. Duterte won the presidency in May as he promised to suppress crime and wipe out drugs and drug dealers. At least 2,400 people have been killed since he took office on July 1, including 900 in police operations against drug pushers. The rest are "deaths under investigation", a term human rights activists in the Philippines say is a euphemism for vigilante and extrajudicial killings.

Duterte said it would be "rude" for Obama to raise the human rights issue and told reporters such a conversation would prompt him to curse at Obama, using a Filipino phrase "putang ina" which can mean "son of a bitch" or "son of a whore". "Plenty will be killed until the last pusher is out of the streets. Until the (last) drug manufacturer is killed we will continue," he said.

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