后院抓人、前院买岛，还想吞并邻居，美国邻居生存“指难”！

Group 1 - The article discusses the shift in U.S. foreign policy from a defensive "Monroe Doctrine" to a more aggressive "Trump Doctrine," characterized by unilateral actions and disregard for international law [1][7] - The U.S. has escalated its approach in South America, exemplified by the operation to detain Venezuelan President Maduro and threats against Colombia and Cuba, indicating a potential for military intervention [3][6] - The U.S. is also pursuing territorial ambitions in Greenland, seeking to acquire the island for its rich resources, despite strong opposition from Greenland's residents [4][5] Group 2 - The rhetoric surrounding Canada becoming the "51st state" reflects a pressure tactic rather than a feasible political move, highlighting the complexities of national sovereignty and political balance [6][7] - The article notes a growing solidarity among Latin American countries in response to U.S. actions, suggesting a shift towards multilateralism and collective security in the region [8] - The emergence of a new order in international relations is indicated, where the aggressive stance of the U.S. is prompting neighboring countries to strengthen their cooperation and defense strategies [8]