President Trump's aggressive foreign policy has prompted rival nations to find countermeasures by controlling global choke points. Iran's blockade of the Strait of Hormuz, which handles 20% of global oil and gas shipments, has disrupted fuel and fertilizer markets since February. This strategic move demonstrates how smaller economies can leverage geographic advantages against U.S. pressure despite accounting for less than 1% of global output.

China has implemented rare-earth mineral export controls that create bottlenecks for U.S. manufacturers of cars, semiconductors, and medical equipment. These controls have caused supply shortages for companies like Medtronic, which produces M.R.I. and C.T. machines. The licensing system gives China unprecedented control over critical components for American industries that Trump aims to revive, including defense manufacturing.

The interconnectedness of global supply chains has exposed U.S. vulnerabilities despite its economic power. Evercore ISI projects U.S. economic growth will fall from 2.8% to 2.2% this year due to energy shocks, while core inflation rises 0.2 percentage points. Higher shipping costs and fertilizer shortages are trickling into consumer prices, creating political challenges ahead of midterm elections and revealing the limits of Trump's transactional approach to international relations.