俄乌和谈僵局难破 特朗普威胁：准备对俄实施第二阶段制裁

Group 1 - The core viewpoint is that President Trump is prepared to implement a second phase of sanctions against Russia, although he did not specify the details of these sanctions [1][4] - Trump has previously threatened further sanctions against Russia but has refrained from implementing them during negotiations [2][4] - The U.S. Treasury Secretary has indicated that discussions are ongoing with Europe regarding new sanctions and secondary tariffs against Russia [4] Group 2 - Trump's recent comments suggest a shift towards a more aggressive stance against Russia amid the ongoing stalemate in Ukraine-Russia negotiations [4] - Despite initial expectations to quickly resolve the Ukraine conflict, Trump has expressed frustration over the inability to halt the ongoing war [4] - The meetings between Trump, Putin, and other leaders have made some progress but have not resolved key differences, leaving the situation in Ukraine unresolved [4]