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Trump to impose 15% tariff on polysilicon imports to curb China's supply chain influence: Report - FirstpostFirstpost · Thu, 06 Aug 2026 00:03:32 GMTUS Weighs Polysilicon Price Floor and Tariffs to Curb China's Supply Chain Dominance - Seoul Economic DailySeoul Economic Daily · Wed, 05 Aug 2026 02:17:47 GMT