威胁对俄实施制裁，又派高官赴俄沟通，美国要求俄乌8月8日前达成协议

Core Viewpoint - The article discusses the escalating tensions between the United States and Russia regarding the ongoing conflict in Ukraine, highlighting President Trump's criticism of Russia's actions and the potential for new sanctions against Russia [1][2][3]. Group 1: U.S. Actions and Statements - President Trump criticized Russia's missile and drone attacks on Ukraine, calling them "disgusting" and indicating plans for new sanctions against Russia [1]. - Trump's special envoy for the Middle East, Wittekov, is expected to visit Russia shortly before the proposed sanctions are implemented on August 8, marking the first new sanctions against Russia since Trump took office [1]. - U.S. Ambassador to the UN, John Kelly, emphasized the need for negotiations between Russia and Ukraine for a ceasefire and lasting peace, urging that this must be completed before August 8 [1]. Group 2: Russian Response and Military Situation - Russia has reportedly maintained its military advantage on the battlefield, continuing drone and missile attacks against Ukraine, with significant strikes reported on Kyiv [3][4]. - Russian President Putin expressed willingness to wait for Ukraine's leadership to reconsider the timing of negotiations, emphasizing the importance of dialogue for peace [3]. - The control of strategic locations, such as Chasiv Yar in the Donetsk region, is crucial for Russia's military objectives, with claims of full control over northern and eastern areas of the region [4].