US relations with Southeast Asia ended on a down note in 2023 with the last-minute failure to finalize the trade pillar of the Indo-Pacific Economic Framework (IPEF). This was not a complete loss for ASEAN states that managed to negotiate bilateral supply chain resilience agreements. However, it underscored the fact that broad regional frameworks, particularly for trade, are off the table with Washington, at least until the United States is past the November 2024 elections. Instead, the administration focused on security over trade and on key partners in the region, with Biden skipping the East Asia Summit (EAS) in Jakarta for a visit to Vietnam and the announcement of the US-Vietnam Comprehensive Strategic Partnership. In this period, US relations with the Philippines continued to strengthen, with Washington issuing three statements calling out China for its reckless maneuvers in the Philippines’ Exclusive Economic Zone in the South China Sea. But if some Southeast Asians were miffed by the administration’s focus on bilateralism over regionalism, most were reassured by Biden’s meeting with Xi Jinping on the margins of the APEC meeting in San Francisco. 

Over the summer three Southeast Asian nations—Thailand, Cambodia, and Indonesia—conducted political contests or prepared for them, with Washington and Beijing watching closely for shifts in alignments or opportunities to make inroads with new leaders. Despite this, and possibly because of it, China made bold moves in the South China Sea and caused outcry in the region with the release of a map supporting its claims to the “Nine-Dash Line.” Beijing also showed signs of worry about Russian inroads into Southeast Asia and the Indo-Pacific region. The high-profile visit to Washington of Philippine President Ferdinand “Bongbong” Marcos, Jr. enabled both countries to reconfirm the US-Philippines alliance publicly, although it gave little indication of where the broader relationship may be headed. ASEAN continued to make little headway in helping to resolve the conflict in Myanmar; and the 2023 chair, Jakarta attempted to redirect the group toward economic goals and a common approach to looming food insecurity in the region.

With an apparent renaissance in the US-Philippine alliance, spurred by rising tensions in the South China Sea and the Taiwan Strait, the Biden administration ramped up diplomatic activity with Manila as the two countries moved toward an official visit from President Ferdinand “Bongbong” Marcos, Jr., in May. At the same time, the 42nd iteration of Cobra Gold, which returned to full strength for the first time since the 2014 coup in Bangkok, suggested momentum in the US-Thailand alliance, albeit with a lower profile. While the international environment continued to be roiled by US-China rivalry, the Russian war in Ukraine, and high food and commodity prices, Southeast Asia’s own internal turmoil was evident. The junta in Myanmar extended the state of emergency and stepped up aerial bombing of areas held by the opposition and armed ethnic groups. As Indonesia takes up the ASEAN chair, prospects for implementing the Five-Point Consensus Plan are dim, if not dead. Vietnam and Thailand began leadership transitions—Hanoi with an anti-corruption purge and Bangkok with the launch of general elections—while Cambodian Prime Minister Hun Sen continued to eviscerate the opposition ahead of his near-certain re-election in July.

In November three ASEAN states—Cambodia, Indonesia, and Thailand—drew favorable marks for their chairmanship of high-profile regional and global meetings: the East Asia Summit and ASEAN Leaders Meeting; the G20 Summit; and the Asia Pacific Economic Cooperation (APEC) meeting, respectively. Helming these meetings was particularly challenging for Southeast Asian leaders—who are naturally inclined to avoid strong alignments with external powers—in the current global environment of heightened tensions between the United States and China in the Taiwan Strait and the war in Ukraine. However, the year was a difficult period for ASEAN internally, with uneven economic recovery from the COVID-19 pandemic and the intractable conflict in Myanmar. The last quarter of 2022 saw two political shifts in the region: in general elections in Malaysia, Anwar Ibrahim achieved a longstanding ambition to become prime minister but will have to manage a difficult coalition to retain power. At the year’s end, Laos changed prime ministers, but it is not clear if the transition will solve the country’s debt problems, which were revealed to be more dire than estimated.

The Biden administration’s diplomatic campaign in Southeast Asia kicked into high gear in the late spring and continued through the summer. On May 12-13 President Biden co-hosted, with Cambodian Prime Minister Hun Sen as the 2022 ASEAN chair, the first-ever US-ASEAN Special Summit to be held in Washington, DC. US relations in the region were also boosted when the Biden administration launched the long-awaited Indo-Pacific Economic Framework (IPEF) on May 23; seven Southeast Asian countries indicated interest in joining, although few are likely to accede to all four pillars of the framework in the near-term. Two Cabinet officials made visits to two US treaty allies: Secretary of Defense Lloyd Austin to Thailand in June and Secretary of State Anthony Blinken to the Philippines in August. Notwithstanding continuing differences over human rights, the visits served to reaffirm the bilateral alliances. However, global and regional tensions remained high, over the persistent crisis in Ukraine; brinksmanship in the Taiwan Straits; and the internal conflict in Myanmar which has only deteriorated further. These pressures only divided ASEAN further as the region looks ahead to a trifecta of international meetings—APEC, East Asia Summit, and the G20—in the fall.

Political activity was also at high levels, with elections in the Philippines; a surprise move by the Constitutional Court of Thailand to suspend Prime Minister Prayuth Chan-ocha; and a prison sentence for former Malaysian Prime Minister Najib Razak. In Thailand, Cambodia, Malaysia, Indonesia and possibly Myanmar, current political dynamics will help set the stage for elections in 2023 and 2024.