Marco Rubio said after the Atlanta meeting that the Quad opposes behaviours, not countries. The grouping also prioritised supply-chain resilience, economic security and expanded. China, But Addresses 'One Country's' Behavior, Says Marco Rubio - US Secretary of State Marco Rubio clarified that the Quad alliance is not inherently anti-China or against any specific ... Without naming China, foreign ministers express ‘grave concerns’ about overcapacity disrupting global supply chains in critical industries.