The foreign ministers of the Quadrilateral Security Dialogue, or Quad, nations gathered in New Delhi on Tuesday in a coordinated display of unity aimed at reaffirming the bloc’s relevance amid recent shifts in geopolitical dynamics.The Quad, comprising the United States, Japan, Australia and India, aims to promote a “free and open” Indo-Pacific and balance China’s expanding influence in the strategically vital region.With US President Donald Trump fresh from talks with Chinese President Xi...