特朗普：道歉没用，不谈！

Group 1: Trade Relations - President Trump has categorically refused to restart trade negotiations with Canada, citing dissatisfaction with a Canadian advertisement that he deemed misleading [3][4] - Following the breakdown of trade talks, Trump announced a 10% additional tariff on Canadian imports, indicating a significant shift in U.S.-Canada trade relations [3][4] - Despite the tensions, Trump acknowledged having a good relationship with Canadian Prime Minister Mark Carney, suggesting that personal relations may not fully reflect the political climate [3] Group 2: Economic Impact - Canada is the second-largest trading partner of the U.S. and a major supplier of steel and aluminum, making the trade dispute particularly impactful for both economies [3] - The imposition of global tariffs by Trump has severely affected Canadian industries, despite most cross-border trade still enjoying tariff-free status under the USMCA [3] Group 3: Political Context - The deterioration of U.S.-Canada relations has been marked by Trump's return to the White House in January, indicating a potential shift in diplomatic and economic strategies [3]