美国面临什么形势，沙利文看得一清二楚，布局中国周边4年白干了

Group 1 - The Trump administration's tariff war has led to significant economic uncertainty globally, impacting both the U.S. and its allies [1][3] - Former National Security Advisor Sullivan expressed disappointment over the collapse of the global ally network that the U.S. had cultivated over the past four years [3][5] - The imposition of a 50% tariff on U.S. imports by India is seen as a severe measure that undermines U.S. efforts to counter China's influence [7][8] Group 2 - Sullivan noted that many countries now view the U.S. as an unreliable partner, with public sentiment shifting in favor of China in several regions [5][8] - The recent tariff actions are perceived as a strategic miscalculation that could accelerate the decline of U.S. global leadership and contribute to a multipolar world order [8] - The current geopolitical landscape has shifted from a U.S.-led coalition against China to a scenario where countries emphasize the unreliability of the U.S. [7][8]