"If you are friends with two countries which are on different sides, sometimes it is possible to get along with both, sometimes it's more awkward when you try to get along with both," Prime Minister Lee Hsien Loong warned.
"What's wrong with my nap?" asked the president, who is in Singapore this week to attend the Association of Southeast Asian Nations meeting.
The prime minister was greeted by enthusiastic crowds in the Philippines—in stark contrast to Trump, whose visit was met with protests.
One of the activists dubbed the effigy "the fascist spinner."
Independent observers are still largely excluded from the area and have not been able to verify the grave.
Pyongyang should be shown the cost of pursuing nuclear weapons development, a State Department official said.
Malaysia, the Philippines, Vietnam, Japan, and China all claim parts of the South China Sea.
Though the U.S. has not run any freedom of navigation patrols since Trump became president, the policy of testing China had not changed, said the Pacific Fleet Commander.
Members of the Association of South East Asian Nations (ASEAN) will adopt a softer than usual tone about South China Sea disputes at a leaders' summit on Saturday in Manila.
Some think China is preparing an "air defense identification zone" over the South China Sea.
ASEAN members wanted the Phillipines' victory mentioned in a statement but nations fail to agree on maritime disputes.
China insists it has undisputed sovereignty over most of the South China Sea, a claim that overlaps with four ASEAN countries.