Formed in 1967, the Association of Southeast Asian Nations (ASEAN) is a regional organization dedicated to intergovernmental cooperation and economic integration. There is significant economic potential in this fast-growing region with 625 million people living in ASEAN’s ten member states and a real Gross Domestic Product of over $2.5 trillion. What will be the role of the United States in the region after President Trump’s withdrawal from the Trans-Pacific Partnership? What impact are domestic politics in ASEAN countries playing on regional stability and economic relations with the United States?