市场消息：在特朗普不确定性加剧之际，美铁（Amtrak）计划裁减20%的高层人员。

Group 1 - The core point of the article highlights that Amtrak plans to cut 20% of its senior management amid increasing uncertainty surrounding Trump [1] Group 2 - The decision to reduce senior personnel is likely a strategic move to streamline operations in response to external political factors [1]