As of my last update in October 2023, there was no specific information regarding a newly elected president of the United States proposing four distinct policies in Vietnam. However, U.S. foreign policy can involve various areas such as trade, security, climate change, and human rights. If you have a specific president or recent event in mind, I recommend checking reliable news sources for the latest developments.
If you wish to discuss general U.S. policies toward Vietnam, please let me know!