Brazil–United States relations during the João Goulart government (1961–1964) gradually deteriorated, culminating in American support for the ousting of the Brazilian president in the 1964 coup d'état in Brazil. Although the dynamics of the crisis were primarily Brazilian, American actions progressively increased the chances of the occurrence and success of a rebellion against the government. Historians differ on the inevitability of a clash between the Goulart and John F. Kennedy/Lyndon B. Johnson administrations, the relative importance of the sticking points, and the timing of when the U.S. government decided to support the Brazilian's deposition-earlier, as in 1962, or later, only in 1963.