Switzerland talks enter tough phase after Trump renews threats against Iran

US Vice President JD Vance said Sunday there was a chance to “turn over a new leaf” with Iran as negotiators met in Switzerland to build on last week’s interim agreement. But President Donald Trump’s renewed threats over Iran-backed Hezbollah and the Strait of Hormuz – and Israel's refusal to withdraw from a security zone in southern Lebanon – cast a long shadow over the fragile talks.