The Trotskyist Fraction – Fourth International is a political international of Trotskyist political organizations that claim to adhere to the political legacy of the Fourth International. It was formed by groups which arose as the "Internationalist Bolshevik Faction" within the International Workers League (IWL-FI) in 1989. Regarded at first as an "external fraction" who had been wrongly expelled, from 1988 to 1990 the Argentinian Socialist Workers' Party (PTS) had three splits: first when a number of militants returned to the Argentinian Movement for Socialism (MAS) party, then when another group of militants sympathized with the British Workers Revolutionary Party and the third when supporters of León Pérez decided to follow a mass party perspective.
The Socialist Workers' Party, previously known as the Workers Party for Socialism, is a Trotskyist political party in Argentina. It was founded in 1988, as the first schism of the Movement for Socialism (MAS), a Trotskyist party led by Nahuel Moreno until his death. Within the next four years, the MAS split into more than 20 groups.
Eric Calcagno y Maillmann is an Argentine sociologist, journalist, diplomat and politician. A member of the Justicialist Party, Calcagno served terms in both houses of the Argentine Congress, first as a Senator from 2007 to 2011, and later as a Deputy from 2011 to 2015. He was Argentina's ambassador to France from 2005 to 2007.
Jorge Félix Arrate Mac Niven is a Chilean lawyer, economist, writer and politician. He has been Minister of State in the governments of Chilean presidents Salvador Allende (1970–1973), Patricio Aylwin (1990–1994), and Eduardo Frei Ruiz-Tagle (1994–2000). A long-time member of the Socialist Party of Chile arrate was during much of the 1990s the leader of the eponymous Arratismo faction in the party. During the indictment and arrest of Augusto Pinochet (1998–2000) Arrate was positive to the prospect of Pinochet being judged abroad. Given that his was contrary to the government stance he was removed from his post as minister in June 1999. In 2009, he was appointed as candidate for president of Chile in representation of the political alliance Juntos Podemos Más and other leftist political movements, obtaining 6.21 percent of the total votes in the elections of that year.
The Workers' Left Front – Unity is an alliance of initially three Trotskyist parties in Argentina formed to participate in elections in 2011, announced at a press conference in April that year. They are the Workers' Party (PO), the United Socialist Workers' Party (PSTU), the Socialist Workers' Party (PTS), and Socialist Left (IS). In 2019, the Workers' Socialist Movement (MST) joined the alliance.
Alcira Susana Argumedo was an Argentine sociologist, academic and was member of the Argentine Chamber of Deputies. She was nominated as a candidate for president on the Proyecto Sur ticket for the 2011 general elections.
Julio Moizeszowicz is an Argentine psychiatrist. He was born May 25, 1943 in Buenos Aires, Argentina. He is the son of Polish immigrants who moved to Argentina before World War II.
Nicolás del Caño is an Argentine politician from the Socialist Workers' Party. He was twice the presidential candidate for the Workers' Left Front (FIT).
Broad Front UNEN was an center-left political coalition in Argentina. It arose through an alliance between Radical Civic Union, Civic Coalition ARI, Proyecto Sur, Freemen of the South Movement, Socialist Party, Authentic Socialist Party, and GEN.
Myriam Bregman is an Argentine lawyer, activist, and politician. Raised in a Jewish family, Bregman joined the Socialist Workers' Party (PTS) – a Trotskyist Argentine party of which she is among the most prominent members – while studying a degree in law at the University of Buenos Aires in the 90s.
Ismael Crespo Martínez is a political scientist and expert in Latin America, Professor of Political science at the University of Murcia, Spain, and director of the Department of Political Science and Administration at the same university. In addition, he runs MásPoderLocalArchived 2017-03-01 at the Wayback Machine, a digital magazine on political communication and electoral behavior focused on Spain and Latin America. Since 2012, he is the president of the Latin American Association of Electoral Campaign Researchers.
Romina Del Plá is an activist in the Workers' Party (Argentina).
Alejandro Ariel Vilca is an Argentine activist, garbage worker, trade unionist and politician, active in the Socialist Workers' Party (PTS). A member of the indigenous Qulla people, Vilca was elected to the provincial legislature of Jujuy Province in 2017 on the Workers' Left Front (FIT) list, which won 18% of the vote. In 2021, he was elected to the National Chamber of Deputies.
Dora Beatriz Barrancos is an Argentine researcher, sociologist, historian, feminist, and politician.
Popular Unity, officially registered as the Electoral Instrument for Popular Unity is a left-wing nationalist political party in Argentina, founded by trade union leader and former CTA secretary-general Víctor De Gennaro in 2010. It was part of the Frente de Todos, the coalition formed in 2019 to support the presidential candidacy of Alberto Fernández. It is now part of the Union for the Homeland which was formed to support Sergio Massa's 2023 presidential campaign. From 2011 to 2013 it was part of the Broad Progressive Front (FAP).
Nathalia Inés González Seligra is an Argentine teacher and politician who was a National Deputy from 2017 to 2019 for the Socialist Workers' Party (PTS).
María Fernanda Raverta is an Argentine politician. She is currently the Executive Director of ANSES, appointed by President Alberto Fernández. She previously was Community Development of Buenos Aires Province.
Mónica Leticia Schlotthauer is an Argentine railway worker and union leader who served as a member of the Argentine Chamber of Deputies elected in Buenos Aires Province on two occasions, from April to December 2019, and later from June to December 2021. Schlotthauer is a member of Socialist Left, a Trotskyist political party organized within the Workers' Left Front.
Avanza Libertad, originally founded in 2019 as Frente Despertar, was an Argentine right-wing political coalition. Renamed in 2020, Avanza Libertad had legal status in the Buenos Aires Province. Ideologically, it is libertarian conservative, supportive of economic liberalism, ultraconservatism, and critical of both Kirchnerism and Juntos por el Cambio. Led by José Luis Espert, is a far-right coalition, with its being compared to Spain's Vox.
Manuela Jimena Castañeira is an Argentine sociologist, feminist activist and politician. She is the leader of the Trotskyist Movimiento al Socialismo and was the party's presidential candidate in the 2015, 2019, and 2023 general elections. In all occasions, she did not receive enough votes in the PASO primaries to make it past the threshold to participate in the general election.
