美施压加拿大禁止对华签约，中方一句话坚定回应

Group 1 - The core viewpoint of the article highlights the U.S. threat to Canada regarding trade agreements with China, specifically the imposition of a 100% tariff on Canadian imports if such an agreement is reached [1][3] - U.S. Treasury Secretary Mnuchin and President Trump both issued warnings against Canada pursuing new trade deals with China, indicating a strong stance from the U.S. government [1] - Experts suggest that this threat reflects a broader issue of unilateralism and the undermining of national sovereignty, signaling a dangerous trend against globalization [3] Group 2 - The U.S. view of Canada as part of its "sphere of influence" is rooted in a long-standing economic relationship, where Canada heavily relies on the U.S. market for exports, particularly in key sectors like energy and steel [3] - The asymmetric dependency between the U.S. and Canada provides the U.S. with leverage to threaten tariffs, showcasing a power dynamic that complicates trade relations [3] - The article argues that the U.S. interference in Canada-China trade relations is a violation of international law, as sovereign nations have the right to choose their trade partners [3]