Fijo Pact between the major parties (originally including the Democratic Republican Union, which later dwindled in significance), with the notable exclusion of the Communist Party of Venezuela. By the end of the 1990s, however, the now two-party system's credibility was almost nonexistent, mostly because of the corruption and poverty that Venezuelans experienced because of 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). Current Confidence in the traditional parties collapsed enough that the 1993 presidential elections were won by Rafael Caldera on around 30% of the vote, representing a new electoral coalition, National Convergence. By 1998, support for Democratic Action and COPEI had fallen still further, and the 1998 election was won by political outsider Hugo Chávez. Since then, a range of newer parties (such as A New Era and Justice First) have been more prominent in opposition to Chávez than the traditional main parties Democratic Action and COPEI. The United Socialist Party of Venezuela (Partido Socialista Unido de Venezuela, PSUV) was created in 2007, uniting a number of smaller parties supporting Chávez' Bolivarian Revolution with Chávez' Fifth Republic Movement. It is the lead party of the Great Patriotic Pole coalition. The Democratic Unity Roundtable (Mesa de la Unidad Democrática, MUD), created in 2008, unites much of the opposition. Hugo Chávez, the central figure of the Venezuelan political landscape since 1998, died in office in early 2013, and was succeeded by Nicolás Maduro (initially as interim President, before narrowly winning the 2013 Venezuelan presidential election). Polling procedure Since 1998 elections in Venezuela have become more automated, and administered by the National Electoral Council, with poll workers drafted via a lottery of registered voters. Polling places are equipped with multiple touch-screen DRE voting machines, one per "mesa electoral", or voting "table". After the vote is cast, each machine prints out a paper ballot, or VVPAT, which is inspected by the voter and deposited in a ballot box belonging to the machine's table. The voting machines perform in a stand-alone fashion, disconnected from any network until the polls close. Voting session closure at each of the voting stations in a given polling center is determined either by the lack of further voters after the