Copper spikes to record on Trump's tariff threat, but quick U.S. self-sufficiency push is a pipedream

Open this photo in gallery: A worker walks toward a Resolution Copper exploratory mine shaft in Superior, Ariz., in 2021. On Tuesday, U.S. President Donald Trump said he will soon impose 50-per-cent tariffs on copper imports.Caitlin O’Hara/Reuters U.S. copper prices are spiking following President Donald Trump's threat to impose tariffs on imports of the metal, but his plan to quickly boost domestic mining, smelting and refining capacity is a pipe dream, industry executives, analysts and consultants say. Mr. Trump on Tuesday said he will soon impose 50-per-cent tariffs on copper imports following a Section 232 investigation under the U.S. Trade…