On What Really Matters, Walter Russell Mead discusses Elon Musk’s departure from Washington, America’s nonexistent shipbuilding capacity, plans to revoke visas from Chinese students, and the conspicuous absence of Joe Biden’s foreign policy team from the new book on the "coverup" of his condition.

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Bucket-wheel excavators mine rare earth materials on Ukrainian soil on February 25, 2025, in the Zhytomyr region of Ukraine. (Kostiantyn Liberov via Getty Images)