Donald Trump's protectionist trade policies led to a significant narrowing of the US trade deficit in September, with exports rising and imports moderating.Canada simultaneously posted its first trade surplus since the start of the US-led trade war, driven by diversified exports to non-US countries and a decline in imports from the US, alongside a growing "Buy Canadian" movement.However, these aggressive tariff strategies continue to intensify tensions with Canada and Mexico ahead of the USMCA review, while a Supreme Court challenge to Trump's tariff authority remains underway.