取消与普京会晤，特朗普“非常失望”

Core Viewpoint - The recent developments in U.S.-Russia relations, particularly regarding the Ukraine conflict, indicate a shift in President Trump's approach, moving from optimism about achieving a ceasefire to a more cautious stance, as he expresses disappointment over the lack of progress in negotiations [1][3][4]. Group 1: U.S.-Russia Relations - Trump has expressed disappointment in the progress of U.S.-Russia relations and the ongoing Ukraine conflict, indicating that he had hoped for a ceasefire by now [1][4]. - Following a phone call with Putin, Trump proposed a meeting in Budapest, which he later canceled, citing a desire not to waste time on unproductive discussions [2][3]. - The U.S. Treasury announced sanctions against major Russian oil companies, which may signal a deterioration in U.S.-Russia relations [1][5][6]. Group 2: Sanctions and Economic Impact - The U.S. sanctions target state-owned and private Russian oil companies, which account for nearly 50% of Russia's oil exports, indicating a significant economic impact [5][6]. - The European Union has also implemented new sanctions, including a ban on Russian liquefied natural gas, which could further strain the Russian economy [5][6][7]. - Experts suggest that while sanctions may not have a substantial economic impact, they could damage the gradually improving U.S.-Russia relationship [7][8]. Group 3: Negotiation Dynamics - There is a fundamental disagreement between Trump and Putin regarding the conditions for a ceasefire, with Trump advocating for an immediate ceasefire while Putin emphasizes addressing the root causes of the conflict [10][14]. - Ukraine's position has shifted towards seeking a ceasefire, with support from European leaders, but significant differences remain regarding territorial issues [11][14]. - The ongoing diplomatic efforts are complicated by the need for a comprehensive solution that includes input from Ukraine and European nations [10][14][15].