US government revamps supply chains in sweeping China trade policy overhaul

Washington’s long-running effort to untangle American supply chains from Chinese manufacturing has entered a new, more aggressive phase. A 15% tariff on polysilicon derivatives, signed on August 6, 2026 and set to take effect December 4, represents the latest salvo in a broader campaign to reduce US dependence on Chinese-controlled materials critical to both the semiconductor and solar industries. The move lands in a trade landscape that already looks dramatically different from just two years ago. The US-China goods trade deficit shrank by 32% year-over-year in 2025, the first time since 2000 that China didn’t sit atop America’s list of largest trade deficit partners. The polysilicon problem The new tariff targets a vulnerability that’s been years in the making. US share of global polysilicon production capacity collapsed from roughly 50% in 2005 to under 2% by 2024. By slapping a 15% ad valorem duty on polysilicon derivatives under Section 232 authority, the administration is betting that price signals can coax production back onshore. The May summit and managed trade The polysilicon tariff doesn’t exist in a vacuum. It builds on the framework established at the Trump-Xi summit h...