Mattathias Schwartz: A Spymaster Steps Out of the Shadows.The New York Times, 27. Juni 2018, abgerufen am 5. Februar 2021: „Now Brennan was out, having traded world-bestriding power for a handful of gigs: adviser on world events for clients of Kissinger Associates, visiting scholar at Fordham University and the University of Texas, commentator on breaking news for MSNBC.“