U.S. forces countries to choose between Pax Silica and China's WAICO AI coalitions

A draft U.S. State Department letter obtained by Reuters tells 35 countries - all signatories to June's 'AI Opportunity Partnership' statement, including South Korea, Japan and Australia - that they cannot belong to both Pax Silica and China's WAICO framework at the same time. The letter's central line, "To be part of everything is to be part of nothing" ^[1], reframes AI-coalition membership as an exclusivity contract rather than an open partnership: joining WAICO would mean forfeiting the coordinated chip supply chains and AI cooperation Pax Silica promises. Notably, the draft never names China outright, instead warning that Pax Silica membership 'cannot be held alongside membership in duplicative initiatives whose expectations conflict with our own' ^[1]- diplomatic language for a hard veto.

The trigger appears to be a single country breaking the pattern first. Kazakhstan is currently the only nation holding membership in both blocs ^[3], and a senior U.S. official's warning that a country claiming to be 'a reliable partner of the United States while joining China's AI initiative' should have its trustworthiness questioned ^[2]reads like a direct rebuke aimed at Astana. If Kazakhstan is allowed to keep hedging without consequence, the calculus changes for the other 34 letter recipients - which is likely why analysts describe the U.S. move as 'weaponizing' its supply-chain leverage in full public view ^[4].

Pax Silica wasn't built as an AI-values club - it was built as a supply-chain insurance policy. China refines roughly 90% of the world's rare earth elements and processes 19 of the 20 minerals classified as strategically critical ^[5]. When Beijing tightened export controls on magnets in October 2025, Chinese magnet exports reportedly fell 75%, rattling defense and electronics supply chains that depend on those materials ^[5]. The U.S. State Department launched Pax Silica two months later, on December 12, 2025, as a coalition spanning semiconductors, AI, rare earths, advanced manufacturing and energy ^[5]- explicitly designed to reduce reliance on Chinese-controlled inputs.

That origin story matters for reading the choose-sides letter correctly: this isn't primarily a fight over AI governance philosophy, it's a fight over who controls the physical inputs - chips, magnets, minerals - that make frontier AI possible. The access the U.S. is threatening to withhold from WAICO members isn't abstract diplomatic goodwill; it's coordinated entry into a supply chain the U.S. and its allies are still racing to build as an alternative to Chinese-controlled sources. That is also why the threat carries real teeth for smaller or resource-poor economies, even if it looks more symbolic for countries with existing domestic capacity.

Not everyone accepts that countries actually face a binary choice. Gloria Shkurti Özdemir, director of the Emerging Technologies and AI Research Center at Khazar University, argues that Pax Silica and WAICO operate on different layers of the AI stack entirely - one governs physical supply chains, the other governs norms and cooperation frameworks - so 'AI power is not about choosing sides but about managing dependencies across the technology stack' ^[6]. Under that reading, a country could keep selling minerals into the Pax Silica supply chain while still adopting WAICO's governance architecture or training programs, making a clean U.S.-style exclusivity rule difficult to actually enforce.

That structural mismatch lines up with how the two blocs are pitching themselves. Pax Silica runs on conditionality - membership benefits are contingent on exclusive commitment, per the letter's own language. WAICO, founded July 16, 2026 in Shanghai with 29-30 signatories and UN Secretary-General António Guterres in attendance, runs on diffusion instead: it pledges 5,000 AI training slots for developing countries and cooperation centers with the Global South via ASEAN, the African Union, the Arab League and BRICS ^[8]. That's a much easier pitch to Global South governments than an exclusivity clause. Chinese commentators have seized on the contrast - Li Yong of the China Society for WTO Studies called the U.S. ultimatum 'a futile geopolitical gamble' ^[7], while Hu Qimu of the Digital-Real Economies Integration Forum 50 argued the demand ignores how 'the Chinese and US economies are inherently complementary' ^[7]- framing Washington's move as fighting the wrong war.

The choose-sides narrative implies a clean, cohesive U.S.-led camp facing off against China. The reality inside Pax Silica is messier. The Netherlands recently joined Pax Silica alongside South Korea and Japan specifically to help counter Chinese chip-supply dominance, with ASML's advanced lithography technology treated as the crown jewel Washington wants kept out of Chinese hands. Yet U.S. officials have reportedly raised private concerns about whether that technology has already reached China regardless, with the Dutch government downplaying rather than confirming the allegation - friction over enforcement inside the bloc the U.S. is trying to hold together, well before any WAICO defection even enters the picture.

That internal strain matters because the choose-sides letter assumes Washington can cleanly police a 35-country coalition's behavior. In practice, even a founding-tier ally can end up in a quiet compliance dispute. For smaller or non-aligned states, the tradeoffs are starker still - domestic political fights over hosting Pax Silica infrastructure, like data-center buildouts, show how contentious full alignment can be at home even where the economic case is strong, with a binary choice that Özdemir's layered read suggests may not even be strictly necessary ^[6]. The UAE, by contrast, shows the upside case: it became Pax Silica's ninth signatory in January 2026 and used that membership specifically to lock in advanced U.S. semiconductor access for its data-center expansion ^[9]- a reminder that for states with capital and leverage, picking a side can pay off precisely as designed.