Gardiner Harris, Eric Schmitt: To Secure Better Housing, Top Diplomat Pulls Rank on the Military. In: The New York Times. 7. September 2018, abgerufen am 30. Dezember 2018 (englisch): „Mr. Mattis now has the same house that Mr. Gates once used, paying $3,383.10 in monthly rent from an annual salary of about $200,000. Mr. Pompeo earns a similar amount.“