2025年10月23日，美國總統唐納德·川普透過社交媒體宣布，由於加拿大涉嫌利用虛假廣告干擾美國司法裁決，美國將立即終止與加拿大的所有貿易談判，並對加拿大商品加徵10%關稅。此舉在北美經貿圈引發廣泛關注與震動。

事件的起因涉及美國羅納德·雷根基金會對加拿大安大略省政府的指控。據稱，加方未經授權使用並篡改前總統里根1987年關於貿易的演講片段，製作虛假廣告。該廣告內容暗示雷根反對關稅政策，並在涉及金額的報導上出現7.5萬美元與7500萬美元的巨大差異，引發美方強烈不滿。特朗普表示，加拿大此舉的目的是干擾美國最高法院及其他法院的裁決，強調關稅對美國國家安全和經濟具有重要意義。

基於加拿大政府的“惡劣行徑”，川普宣布即刻終止與加拿大的所有貿易談判，並額外增加關稅作為懲戒措施。此舉標誌著加美雙邊關係因貿易與司法爭議再度升溫。截至2025年10月24日，加拿大官方尚未對此事作出正式回應。然而，背景上，加美關係此前已因關稅問題存在緊張氣氛。加拿大總理卡尼近期曾表態，將逐步減少對美國經濟的依賴，並計劃拓展與非美國市場的貿易合作例如中國與歐洲，以應對貿易摩擦和國際經濟多元化需求。

此次事件不僅涉及雙邊貿易，也觸及跨國政治宣傳、司法干預及國家安全議題，未來加美經濟與政治互動將受到高度關注。

On October 23, 2025, U.S. President Donald Trump announced via social media that the United States would immediately terminate all trade negotiations with Canada and impose an additional 10% tariff on Canadian goods. The decision was prompted by allegations that Canada had used misleading advertisements to interfere with U.S. judicial rulings, sending shockwaves through North American trade and diplomatic circles.

The dispute arose from accusations by the Ronald Reagan Foundation that the Ontario provincial government had unauthorizedly used and altered excerpts from former President Reagan’s 1987 trade speech to produce misleading ads. These ads suggested that Reagan opposed certain tariff policies, and reports conflicted on the amounts involved—ranging from $75,000 to $75 million—which further fueled U.S. objections. Trump claimed that Canada’s actions aimed to disrupt rulings by the U.S. Supreme Court and other courts, emphasizing that tariffs are critical to U.S. national security and economic interests.

Citing these “malicious acts” by the Canadian government, Trump declared an immediate halt to all trade negotiations and implemented the additional tariffs as punitive measures. This move marks a significant escalation in U.S.-Canada relations over trade and judicial disputes.

As of October 24, 2025, the Canadian government had not issued an official response. Contextually, U.S.-Canada relations had already been strained over tariff issues. Canadian Prime Minister Karnie had recently stated intentions to reduce Canada’s economic dependence on the U.S. and expand trade partnerships with non-U.S. markets to mitigate trade frictions and diversify the country’s international economic engagement.

This incident highlights tensions not only in bilateral trade but also in cross-border political messaging, judicial interference concerns, and national security considerations. Observers will closely monitor how this development affects future U.S.-Canada economic and political interactions.