惯用伎俩还是真谈崩了？特朗普缘何再度叫停与加拿大的贸易谈判

Core Points - President Trump has announced the termination of all trade negotiations with Canada due to a controversial advertisement released by the Ontario provincial government, which included critical remarks about tariffs from former President Ronald Reagan [1][3] - The ongoing trade negotiations between the U.S. and Canada have reached a critical stage, focusing on sectors such as steel, aluminum, energy, and automotive [5][6] - The Canadian government is considering strategies to reduce reliance on the U.S. market and expand exports to other countries, particularly in Asia [7] Group 1: Trade Negotiations - Trump criticized the Ontario government's advertisement as interference in U.S. judicial matters, particularly regarding the legality of tariffs imposed under the International Emergency Economic Powers Act [1] - The negotiations had previously shown promise, with potential agreements on steel, aluminum, and energy sectors expected by the end of the month [1][5] - Current tariffs on Canadian imports include a 35% tariff on goods not compliant with the USMCA, 50% on steel and aluminum, and 25% on certain automotive products [5] Group 2: Canadian Response - Ontario Premier Doug Ford's advertisement, which criticized U.S. tariffs, has been identified as a catalyst for the recent breakdown in negotiations [3][4] - The Canadian government has removed most retaliatory tariffs on U.S. products, maintaining only those on steel, aluminum, and automotive sectors to alleviate domestic inflation [5] - In response to Trump's threats, Canada plans to significantly increase exports to non-U.S. markets over the next decade, aiming for an additional CAD 300 billion in trade [7]