Group 1 - The core concern expressed by South Korean media is not the Taiwan Strait situation, but rather the decline of U.S. power and the potential abandonment of South Korea by the U.S. [1] - The U.S. has shown a lack of substantial trade agreements with allies such as Japan, South Korea, and the EU in the past 90 days, while frequently imposing tariffs, indicating a self-serving approach that disregards ally interests [3] - The U.S. is demanding NATO members to significantly increase military spending to 5% of GDP, reflecting a shift away from unconditional security commitments to allies [5] Group 2 - South Korea's media concerns about the Taiwan Strait are linked to the perceived weakening of U.S. influence in the global arena, which raises doubts about the reliability of U.S. security commitments to South Korea [7] - The reduction of U.S. Marine Corps troops from the Okinawa base and ambiguous positions on the Korean Peninsula further illustrate South Korea's anxieties regarding U.S. support [7] - The pressure from the U.S. regarding trade and troop cost-sharing has severely damaged South Korea's trust in the U.S. alliance, leading to a strategic approach of highlighting Taiwan Strait issues to draw U.S. attention to South Korean security [7]