我们的国家安全与白宫事务记者戴维·E·桑格解析，尽管唐纳德·特朗普总统近期签署了国会收紧对俄能源制裁的立法，他为何仍与弗拉基米尔·V·普京总统达成协议，将在未来数月进口俄罗斯柴油。
Our national security and White House correspondent David E. Sanger breaks down why President Donald Trump struck a deal with President Vladimir V. Putin to import Russian diesel fuel in the coming months, despite having signed recent congressional legislation tightening energy sanctions on Russia.