In this Feb. 14, 2019 file photo, acting Secretary of Defense Patrick Shanahan speaks about the situation in the Persian Gulf region during a meeting with Portuguese Minister of National Defense Joao Cravinho, at the Pentagon. President Donald Trump has placed acting officials in key posts in significantly higher numbers than his recent predecessors. The practice lets him quickly, if temporarily, install allies in important positions while circumventing the Senate confirmation process, which can be risky with Republicans running the chamber by a slim 53-47 margin. (AP Photo/Manuel Balce Ceneta, File)
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