Lately governments of all stripes have been on a charm offensive with Hanoi, hoping Vietnam’s policy of “bamboo diplomacy” — balancing relations with regional and global powers while attracting foreign investment — will bend their way. In July, the U.S. announced a new trade deal with the Vietnamese government and its Communist Party rulers. Last month, European Union Trade Commissioner Maros Sefcovic visited Hanoi. In the coming months, the EU is likely to deepen trade and security ties with