From talk of acquiring Greenland and its vast mineral wealth to prodding Ukraine for minerals in exchange for help fending off Russia’s invasion, Trump has made the raw materials of modern life a pillar of his foreign policy.

An executive order mandates a review of the threats posed by over-reliance on foreign copper, and recommendations for increasing domestic supply.

Copper futures surged after President Donald Trump ordered the US Commerce Department to examine possible imports tariffs on all forms of the metal.