Elaine McCusker is a professional. A career civil servant specializing in the technical but crucial area of defense budgeting and finance, with prior experience in academia, the private sector and the Senate Armed Services Committee, she was a logical choice for the office to which President Trump elevated her in 2017: deputy comptroller of the Defense Department. She also was amply qualified for promotion to comptroller, a nomination Mr. Trump submitted to the Senate last November.

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