Defense Secretary Jim Mattis resigned Thursday after clashing with President Donald Trump over the withdrawal of U.S. troops from Syria and Afghanistan, saying in a parting letter that the president deserves someone atop the Pentagon "better aligned" with his views.

参考译文：美国国防部长吉姆·马蒂斯(Jim Mattis)周四在与美国总统唐纳德·特朗普(Donald Trump)就美军从叙利亚和阿富汗撤军一事发生冲突后辞职。他在一封告别信中表示，总统应该得到五角大楼高层人事与他的观点“更为一致”。

someone atop the Pentagon "better aligned" with his views.

(1)atop the Pentagon（介词短语作后置定语）

(2)better aligned with his views(过去分词短语作后置定语）

better aligned with his views=who was better aligned with his views.（better为 well比较级）

one align oneself with sb/sth=one is aligned with sb/sth

(1)atop prep.在…顶上;在…上面 (英文解释：If something is atop something else, it is on top of it.）

Under the newspaper, atop a sheet of paper, lay an envelope.  

在报纸下面的一张纸上放着一个信封。

(2)aligh oneself with 与…联合；与…结盟(英文解释：If you align yourself with a particular group, you support them because you have the same political aim.）

There are signs that the prime minister is aligning himself with the liberals...  

有迹象表明首相正在与自由党人结盟。

He has attempted to align the Socialists with the environmental movement. 他已试图争取社会党人支持环境运动。