by an APRA member, General Óscar R. Benavides took power and closed Congress until 1939, when Manuel Prado Ugarteche was elected president. During various dictatorships, the Congress was interrupted by coups d'état. In 1968, Juan Velasco Alvarado overthrew president Fernando Belaúnde by a coup d'état, closing again the Congress. The 1979 Constitution was promulgated on 12 July 1979 by the Constitutional Assembly elected following 10 years of military rule and replaced the suspended 1933 Constitution. It became effective in 1980 with the re-election of deposed President Fernando Belaúnde. It limited the president to a single five-year term and established a bicameral legislature consisting of a 60-member Senate (upper house) and a 180-member Chamber of Deputies (lower house). Members of both chambers were elected for five-year terms, running concurrently with that of the president. Party-list proportional representation was used for both chambers: on a regional basis for the Senate, and using the D'Hondt method for the lower house. Members of both houses had to be Peruvian citizens, with a minimum age of 25 for deputies and 35 for senators. At the beginning of the 1990s, the bicameral congress had a low public approval rating. President Alberto Fujimori did not have the majority in both chambers, the opposition led the Congress, impeding the power that Fujimori had as president. He made the decision of dissolving Congress by a self-coup to his government in 1992. Following the self-coup, in which Congress was dissolved, the Democratic Constitutional Congress established a single chamber of 120 members. The Democratic Constitutional Congress promulgated the 1993 Constitution in which gave more power to the President. The new unicameral Congress started working in 1995, dominated by Fujimori's Congressmen that had the majority. The Congress permits a one-year term for a Congressman or Congresswoman to become President of Congress. During the presidencies of Ollanta Humala, Pedro Pablo Kuczynski and Martín Vizcarra, the right-wing Congress led by the daughter of the former Peruvian dictator Alberto Fujimori, Keiko Fujimori, obstructed much of the actions performed by the presidents. According to Walter Albán, head of Transparency International Peru, the Congress of Peru has recently been infiltrated by criminal groups that obstruct reforms in order to maintain their status and parliamentary immunity. The 2016-2021 congressional term was dissolved by President Martín Vizcarra in September 2019, triggering the 2019–2020 Peruvian constitutional crisis. Vizcarra issued a decree that set snap elections for 26 January 2020. The