HANOI (Reuters) - U.S. President Donald Trump said on Sunday that he was prepared to mediate between claimants to the South China Sea, which include Vietnam and China.  If I can help mediate or arbitrate, please let me know,  Trump said in comments at the start of a meeting in Hanoi with Vietnam s president, Tran Dai Quang. Trump acknowledged that China s position on the South China Sea, nearly all of which is claimed by Beijing, was a problem.   I m a very good mediator and arbitrator,  he said. He also said that China was helping to resolve tensions over North Korea and added he hoped Russia would do the same.   
Trump offers to mediate in South China Sea dispute