市场消息：美国乌克兰问题特使凯洛格称，普京忽视了特朗普给他的机会。

Core Viewpoint - The U.S. Special Envoy for Ukraine, Kurt Volker, stated that President Putin has overlooked opportunities presented by former President Trump [1] Group 1 - The comment highlights the ongoing geopolitical tensions between the U.S. and Russia regarding Ukraine [1] - It suggests that there were potential diplomatic openings that could have been leveraged by Putin during Trump's presidency [1] - The statement reflects the broader implications of U.S. foreign policy on international relations and conflict resolution [1]