In its hunt for critical minerals, the Trump administration is increasingly looking abroad to shore up supply chain security for the raw materials underpinning many of the world’s most powerful technologies. From China to Ukraine to Greenland, key chapters of the Trump administration’s foreign policy in recent months have revolved around critical minerals—a set of 60 or so minerals that the U.S. Geological Survey has deemed essential to U.S. national and economic security. They include rare