特朗普下最后通牒，中方84天内不签协议就征税，美国信用却先崩了

Group 1 - Trump has issued a 90-day ultimatum to China for a trade agreement, threatening to impose tariffs if no deal is reached, with only 84 days remaining [1][3] - The urgency behind Trump's threats is driven by domestic political pressure and the need to maintain a strong image among supporters [3][5] - Other countries, including Japan and the EU, are not responding to Trump's threats as expected, instead opting for a delay in negotiations [5][7] Group 2 - Trump's strategy of setting deadlines to pressure countries into compliance has backfired, as nations are uniting and delaying discussions [9][11] - The recent downgrade of the U.S. credit rating by Moody's from Aaa to Aa1 has weakened Trump's negotiating position internationally [11][13] - The downgrade has led to increased borrowing costs for the U.S. government and higher interest rates for consumers, further complicating Trump's domestic challenges [11][13] Group 3 - The global economic landscape is shifting, with countries looking to leverage the situation to negotiate better terms, inspired by China's ability to secure concessions [7][9] - Trump's unilateral approach to trade negotiations is becoming less effective in a globalized economy, where cooperation is essential [13][15]