突发特讯！特朗普通告全球：再对加拿大征收10%关税，罕见措辞引发美西方高度关注

Group 1 - The diplomatic crisis between the US and Canada was triggered by a tweet from Trump, indicating a potential 10% tariff increase due to perceived hostile actions from Canada [1][3] - The conflict originated from an anti-tariff advertisement aired by Ontario, which referenced a speech by former President Reagan, highlighting the negative impact of high tariffs on the US economy [3] - Trump's response to the advertisement included halting negotiations and refusing to meet with Canadian Prime Minister, showcasing a pattern of retaliatory diplomacy [3] Group 2 - The 10% tariff increase is seen as a political maneuver rather than an economic decision, linking trade policy to personal grievances [3] - The relationship between the US and Canada, historically viewed as a strong alliance, is deteriorating under Trump's "America First" policy, leading to a transactional approach to diplomacy [3] - The silence from traditional allies like the EU and Australia reflects a deeper anxiety about the unpredictability of US trade policies and their implications for global alliances [4] Group 3 - The irony of using Reagan's pro-free trade rhetoric against the US highlights the shifting dynamics of globalization and trade relations [5] - The immediate impact of the tariff increase will be detrimental to Canadian export industries, while US consumers will face rising prices [5] - Long-term consequences may include Canada accelerating its efforts to diversify trade partnerships away from the US, while the US risks losing its leadership in the global trade system [5]