Franchise context: The write-up below is from the parent franchise article (anime, book series, or IP) rather than the card game itself. A dedicated CCG profile has not been written yet.
The United States Secret Service uses code names for U.S. presidents, first ladies, and other prominent persons and locations. The use of such names was originally for security purposes and dates to a time when sensitive electronic communications were not routinely encrypted; today, the names simply serve for purposes of brevity, clarity, and tradition. The Secret Service does not choose these names, however. The White House Communications Agency maintains a list that candidates choose from, often choosing ones that resonate with them personally.