<P> The fall of Batista's regime in Cuba forces Michael to temporarily abandon his plans to become a legitimate businessman, and he resumes his role as the Don of the Corleone family . During the Senate hearings on the Mafia, Hagen is instrumental as the defense when Michael is interrogated . Near the end of the film, Hagen is unable to disguise his displeasure over Michael's increasing ruthlessness and paranoia, questioning the need to kill an already dying Hyman Roth . In response, Michael confronts Hagen about his competing job offers, and obliquely threatens to inform Hagen's wife about his mistress . Challenged point blank to confirm his loyalty to the Corleone Family, Hagen responds to Michael (in Sicilian) that he remains loyal . He dutifully fulfills his role as legal adviser, and also in the consigliere's traditional role as dispassionate family envoy . He gives Frank Pentangeli, who had betrayed Michael, the "idea" of committing suicide so that Pentangeli's family will be taken care of, while agreeing with Pentangeli that at one point the Corleone Family "was like the Roman Empire". </P> <P> In a deleted subplot, Sonny's widow Sandra Corleone becomes Tom's mistress, a fact that Michael uses to blackmail Hagen into remaining loyal despite Sandra urging Hagen to abandon the Corleone family . </P> <P> According to The Godfather Part III, Hagen has already died before the timeframe of the film, 1979--1980 . There is no specific indication in the film as to when or how he died, except that it was prior to his son, Andrew, being ordained a Roman Catholic priest . </P> <P> The Godfather Returns, Mark Winegardner's 2004 sequel to Puzo's original novel, portrays Hagen's role as consigliere in the first few years after Michael ascends to the head of the family . The novel, which covers the period from 1955 - 1962, portrays Hagen once again acting as Michael's right - hand adviser and taking an important role in the Corleones' dealings with a powerful political family, the Sheas (analogous to the Kennedys). Hagen makes a deal with patriarch Mickey Shea (Joseph Kennedy) that the Corleone family would help get his son, James, (John F. Kennedy) elected President on condition that his youngest son, Danny (Robert Kennedy), the new attorney general, would take a soft stance on organized crime . Meanwhile, Hagen has sights on a political career, running for a Congressional seat in Nevada (which Hagen was initially appointed to) with the ultimate goal of becoming the state's governor; he is badly defeated, however, and abandons any hopes of holding public office . </P>

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