The succession line of constitutional presidents run uninterrupted until 1930, when José Félix Uriburu took government through a civic-military "coup d'état". For many decades, there was an alternance between legitimate presidents and others that took government through illegitimate means. Those means included "coups d'état", but also proscriptions of major political parties and electoral fraud. The last "coup d'état" occurred in 1976 and resulted in the National Reorganization Process, which ended in 1983. The retrospective recognition as presidents or heads of state of any "de facto" ruler that exercised its authority outside the Constitutional mandate is a controversial and relevant issue in Argentine politics. However, their government actions were recognized as valid following the "de facto" government doctrine that used to legitimize them. This doctrine was rejected by the 1994 amendment and would not be applicable for potential future coups. The current head of state is President Alberto Fernandez, who took office on 10 December 2019.