A Hoover Institution interview on trade policy and supply-chain chokepoints argues that economic security and national security are now tightly linked. The guests, Sumea Kanes and Chad Bone, emphasize that China’s control of rare earths, permanent magnets, and certain semiconductor inputs gave it real leverage in 2025, beyond tariffs. They also argue that vulnerability mapping, better data, and selective industrial policy can help, but that the hardest problems are indirect dependencies, policy design, and avoiding wasteful, permanent subsidies.
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This conversation centers on the idea that supply-chain chokepoints have become a core instrument of geopolitical power. The host frames the discussion around the book the guests co-authored, then immediately steers to the question of how trade policy, tariffs, export controls, and national-security concerns interact. The core thesis from both guests is that the world has moved from a relatively stable, efficiency-first trade regime to one in which countries can use concentrated supply chains as leverage. China’s ability to restrict rare earths, permanent magnets, and other inputs in 2025 is presented as proof that trade power now includes the ability to disrupt production, not just raise prices via tariffs. Chad Bone’s most concrete examples are the rare earths and permanent magnets episode and the Nexperia semiconductor episode. …
Near term, the trade-policy setup stays volatile: rare-earths, chips, and allied supply chains remain live bargaining chips, so companies with single-source exposure still face sudden disruption risk. Tactical focus should be on the most obvious chokepoints and any policy announcements that force restocking or supplier switching.
Over the next few months, expect more mapping, more selective subsidies, and gradual de-risking rather than full decoupling. The base case is partial diversification with persistent friction, unless governments coordinate better and firms can absorb switching costs without losing competitiveness.
The structural shift is toward a world where supply-chain resilience is treated as a security asset. That means more redundancy, more industrial policy, and less faith that pure efficiency will survive geopolitical rivalry unchanged.
China gained tremendous leverage over the United States in 2025 not through import tariffs but through choke points on rare earths and permanent magnets.
Speaker describes how China stopped selling rare earths and permanent magnets in April/May 2025, threatening to shut down the US automobile industry.
Chinese choke points on rare earths and semiconductors were the primary reason the Trump administration backed down from tariffs on China and returned to the negotiating table in 2025.
Speaker asserts that Chinese retaliation through supply chain choke points, not tariffs, forced the US to de-escalate trade tensions.
The United States has indirect supply chain vulnerabilities that standard trade statistics fail to capture — for example, if China cuts off Japan from rare earths, the US is vulnerable through Japanese permanent magnet imports even if the US does not directly import from China.
Chad argues that true vulnerability assessment requires data on trading partners' vulnerabilities, not just direct import data, using the rare earths/Japan/US permanent magnets example.
How should policymakers think about supply chain vulnerabilities and choke points in relation to economic and national security?
Chad Bone says choke points were a central issue in both the Biden administration and again in 2025, when China used rare earths, permanent magnets, and semiconductor inputs to pressure the United States. He argues these examples show how supply chain dependencies can create major economic and national-security leverage.
How did other countries, especially in Europe and Australia, respond to concerns about choke points after the pandemic?
Sumea Kanes says the pandemic triggered a global wave of vulnerability-mapping exercises in places like Australia, the UK, the European Commission, the OECD, and the US. She says these efforts helped avoid overreaction by bringing economists into the process and focusing on whether countries could recover quickly or find substitutes, rather than just how much they imported from one country.
How successful were the supply chain vulnerability mapping exercises triggered after the pandemic in anticipating the different set of supply chain vulnerabilities that emerged in the 2025 episode Chad described? Did we become aware of where we could be hit, or was it a surprise?
Sumea says that for rare earths and semiconductors, the dependencies were already known, but she's not confident the mapping exercises would have raised those specific problems due to complexity. She notes that governments did these exercises and found fewer vulnerable products than expected but were vague about sharing specific product codes for understandable reasons — not wanting to reveal exactly where they could be coerced.
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