The Globe and Mail reports in its Thursday edition that U.S. copper prices are up following President Donald Trump's announcement of a potential 50-per-cent tariff on copper imports, citing national security concerns. The Globe's Niall McGee writes that industry experts warn that his plan to quickly enhance domestic mining and refining capacity is unrealistic. The specifics of the tariff implementation, including which countries it will affect, remain unclear. Hudbay Minerals chief financial officer Eugene Lei says: "These tariff policies are essentially to repatriate industrial production in the United States. To encourage investment inside the U.S." However, the push to do this will be extremely difficult in copper. If it happens on even a small scale, it will take years. Jefferies analyst Christopher LaFemina says while higher copper prices should incentivize some investment in both mines and smelters, it will take a long time, as much as 10 years. Canadian miner Taseko Mines is constructing the Florence copper mine in Arizona, set to begin production by year-end. The next project, Copper World, also in Arizona and owned by Toronto-based Hudbay, has strong economic potential but will not start production until 2029.