https://cdnph.upi.com/ph/st/th/3061786106875/2026/upi/e4c13238efb8f561f989f8a97a6a8739/v1.5/Trump-announces-tariffs-on-key-part-for-solar-panels-electronics.jpg" /> President Donald Trump has signed an order imposing tariffs on polysilicon, a key component in solar panels and semiconductors, and related products.