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From a reluctant voice on war to America’s chief diplomatic closer – US Vice President JD Vance now faces the defining moment of his political career. Dispatched by President Donald Trump to Islamabad, Vance is leading high-stakes talks aimed at turning a fragile Iran ceasefire into lasting peace. With tensions over Lebanon, sanctions and the Strait of Hormuz threatening to derail negotiations, the 41-year-old anti-interventionist finds himself under intense global scrutiny.