因为一则广告，特朗普宣布：终止与加拿大的所有贸易谈判！美亲密盟友倒戈

Core Points - Trump announced the immediate termination of all trade negotiations with Canada, which has sparked significant public debate and market impact [1] - The decision was influenced by a Canadian advertisement criticizing U.S. tariffs, which Trump viewed as a provocation against his policies [1][2] - The ongoing trade tensions between the U.S. and Canada have been exacerbated by high tariffs on Canadian steel and aluminum products since 2025 [1][2] Group 1: Trade Relations - The U.S. has imposed tariffs as high as 50% on Canadian steel and aluminum, leading to a deterioration of economic trust between the two nations [2] - Canada's government is responding to the crisis by planning to double exports to non-U.S. markets over the next decade, indicating a strategic shift away from reliance on the U.S. [4] - Canada is actively seeking closer strategic ties with emerging markets like China and India, which could fundamentally alter the trade dynamics between the U.S. and Canada [6] Group 2: Economic Implications - Trump's trade strategy reflects a broader "America First" policy aimed at protecting domestic industries, which has led to increased tensions with Canada [2] - The termination of trade talks may lead to a reconfiguration of economic relations in North America, potentially threatening the foundations of the North American Free Trade Agreement [4] - The evolving situation suggests that the once strong economic ties between the U.S. and Canada may shift towards a more fragmented approach, with each country pursuing independent strategies [6]