removed from power by military officers in the 1948 Venezuelan coup. 1958–1999 Background to the current political landscapes is the development of democracy in Venezuela during the twentieth century, in which Democratic Action (ADx or Acción Democrática in Spanish, founded in 1941) and its predecessors played an important role in the early years. Democratic Action led the government during Venezuela's first democratic period (1945–1948). After an intervening decade of dictatorship (1948–1958) and the fall of dictator Marcos Pérez Jiménez saw ADx excluded from power, four Venezuelan presidents came from Democratic Action from the 1960s to the 1990s. This period, known as the "Fourth Republic", is marked by the development of the 1958 Punto Fijo Pact between the major parties (originally including the Democratic Republican Union, which later dwindled in significance). By the end of the 1990s, however, the now two-party system's credibility was almost nonexistent. This was mostly because of the corruption and poverty that Venezuelans experienced as oil wealth poured in during the 1970s and the debt crisis developed during the 1980s. Democratic Action's last president (Carlos Andrés Pérez) was impeached for corruption in 1993 and spent several years in prison as a result. The other main traditional party Copei, provided two Venezuelan presidents (Rafael Caldera, 1969–1974, and Luis Herrera Campins, 1979–1983). Confidence in the traditional parties collapsed enough that Rafael Caldera won the 1993 presidential election with about 30% of the vote, representing a new electoral coalition National Convergence. By 1998, support for Democratic Action and COPEI had fallen still further, and Hugo Chávez, a political outsider, won the 1998 election. 1999–2013 Chávez launched what he called the "Bolivarian Revolution" and fulfilled an election promise by calling a Constituent Assembly in 1999, which drafted the new Constitution of Venezuela. Chávez was granted executive power by the National Assembly to rule by decree multiple times throughout his tenure, passing hundreds of laws. Chávez ruled Venezuela by decree in 2000, 2001, 2004, 2005, 2006, 2007, 2008, 2010, 2011 and 2012. The United Socialist Party of Venezuela (Partido Socialista Unido de Venezuela, PSUV) was created in 2007, uniting a number of smaller parties supporting Hugo Chávez's Bolivarian Revolution with Chávez's Fifth Republic Movement. The Democratic Unity Roundtable (Mesa de la Unidad Democrática, MUD), created in 2008, united much of the opposition (A New Era (UNT), Project Venezuela, Justice First, Movement for Socialism (Venezuela) and others). In 2008, the government expelled the