- Vietnam has long courted support from Washington in its dispute with China over the precious waterway.
- In 2014, China moved an oil rig into waters off Vietnam's shore, sparking violent protests in several Vietnamese cities.
US President Donald Trump told his Vietnamese counterpart Sunday he is ready to help resolve the dispute in the resource-rich South China Sea, which Beijing claims most of.
"If I can help mediate or arbitrate, please let me know... I am a very good mediator," the dealmaking American leader told President Tran Dai Quang during an official state visit Sunday.
Vietnam has long courted support from Washington in its dispute with China over the precious waterway, where Beijing has built military installations and artificial islands.
Beijing's sweeping claims also overlap with those of the Philippines, Malaysia, Brunei and Taiwan.