白宮幕僚長
Leon Panetta, a former White House Chief of Staff under Bill Clinton, Director of the Central Intelligence Agency and Secretary of Defense under Barack Obama, was impressed by the character, telling actor John Spencer that "Any administration that would have Leo McGarry as a White House Chief of Staff would be very, very fortunate." John Podesta, another former White House Chief of Staff, also praised Spencer's performance, saying, "John plays this role in a calm, thoughtful, kindhearted, and loyal manner" although he has commented that Leo is not mean enough.