Soon after Donald Trump concluded a visit to China that he hailed as a great success, America’s top diplomat joined his Indian, Japanese and Australian counterparts in New Delhi for a meeting of the Quadrilateral Security Dialogue. At the meeting on May 26, US Secretary of State Marco Rubio and the foreign ministers launched the Quad Critical Minerals Initiative Framework, a strategic push to curb global reliance on Beijing for rare earth elements. Member states are pooling up to US$20 billion...