The sailor tried to access the president's health records in February but was unsuccessful, according to the Pentagon.
The study evaluated 15,880 active-duty Navy personnel to determine the relationship between job stress and stimulants.
The service is looking to have sailors in the fleet help alleviate an historic recruiting shortfall.
Gunner's Mate 3rd Class Elijah Riddle is at least the second sailor to die aboard a deployed Navy warship in recent weeks.
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