突发特讯！白宫经济顾问通告全球：特朗普对加拿大非常失望，罕见措辞引发全球高度关注

Core Points - The trade relationship between the U.S. and Canada has become increasingly strained, with President Trump expressing significant disappointment and announcing the termination of all trade negotiations with Canada [1][3][5] - The catalyst for this abrupt decision was a controversial advertisement from the Ronald Reagan Foundation, which Trump claimed interfered with U.S. court rulings and was misleading [4][5] - This incident highlights a shift in U.S. trade policy, where even minor provocations can lead to the termination of negotiations, raising concerns about the reliability of the U.S. as a negotiating partner [4][5][10] U.S.-Canada Trade Relations - Canada has historically been a key ally and the largest source of U.S. crude oil imports, sharing the longest undefended border in the world with the U.S. [5] - The U.S. has previously pressured Canada into compromises during trade agreements like NAFTA and USMCA, but recent actions indicate a breakdown of trust and respect in the relationship [5][6] - The perception of U.S. unilateralism is growing, as Canada’s lack of flexibility in negotiations has been criticized, reflecting a broader trend of American dominance in trade discussions [5][6] Global Implications - The abrupt termination of negotiations has raised alarms among other nations, including the EU and Mexico, about the potential for similar actions against them in the future [5][7] - The manner in which Trump announced this decision via social media has further destabilized international relations, making global affairs more unpredictable [9] - Canada may accelerate its trade diversification strategy, seeking closer ties with the EU, the UK, and exploring markets in Asia, particularly in agricultural sectors [9][10] Conclusion - The recent events underscore a significant challenge to the rules-based international order, as U.S. unilateralism threatens established alliances and trade norms [10] - The erosion of trust in U.S. leadership could lead to a search for new global partnerships and alliances as countries reassess their dependencies [10]