as Deputy Director. He later served as National Security Advisor and Vice President before suddenly becoming President of the United States following a terrorist attack on the United States Capitol. Ryan went on to serve two non-consecutive terms and mostly dealt with international crises in Europe, the Middle East, Asia, and Africa. John Clark: A former Navy SEAL and Chief Petty Officer as John Terrence Kelly, he became an operations officer for the CIA after faking his death and adopting the Clark identity, and at one point served as Ryan’s driver and bodyguard. During Ryan's first term as president, Clark served as director of a multinational counter-terrorism unit code-named Rainbow, which is composed of elite soldiers from countries part of the North Atlantic Treaty Organization. After retiring from CIA and Rainbow, he then worked for The Campus, an off-the-books intelligence organization created by President Ryan, later acquiring a higher position as director of operations. Clark has been described by his creator as "Ryan’s dark side" and "more inclined to take physical action than Jack is." Domingo “Ding” Chavez: Born and raised in Los Angeles, Chavez enlisted in the United States Army to escape street life. While on a covert operation against a drug cartel in Colombia, he meets Clark, who becomes his mentor. He is then recruited into the CIA as an operations officer, and is usually paired with his eventual father-in-law on several covert missions. When Clark becomes head of Rainbow, Chavez is assigned as leader of one of the counterterror organization's two assault teams. After retiring from the CIA and Rainbow, Chavez joins The Campus as an operations officer, later acquiring a senior status. Daniel E. “Dan” Murray: A veteran FBI agent, Murray is assigned to a partnership with MI5 in England where he meets Ryan in Patriot Games. Murray becomes one of Ryan’s greatest allies, helping him throughout several novels. Vice Admiral James Greer: Deputy Director of the CIA and Ryan’s mentor. Greer is known for his sense of humor and kindness. Greer often gives Ryan advice and aids him to his best ability. Greer dies of pancreatic cancer in Clear and Present Danger. Some of the key characters have been portrayed in the following movies and television series: Cast Presidents A total of six presidents are depicted in the Ryanverse, although only five are named: The unnamed man referred to as "the President" or later by