Sandra Botero is Associate Professor of Political Science at Universidad del Rosario, Colombia. She holds a PhD in Political Science from the University of Notre Dame, an MA in Latin American Studies from the University of Texas at Austin, and a BA in History from Universidad Nacional de Colombia. She is the author of Courts That Matter: Activists, Judges and the Politics of Rights Enforcement (Cambridge University Press, 2023), the co-editor, with Ezequiel Gonzalez Ocantos and Daniel M. Brinks, of The Limits of Judicialization: From Progress to Backlash in Latin American Politics (Cambridge University Press, 2022), and co-editor with Miguel García Sánchez of Paz y Opinión Pública en Colombia (Universidad del Rosario and Universidad de los Andes, 2024).

Rodrigo Castro Cornejo is Associate Professor in the Department of Political Science at the University of Massachusetts–Lowell, where he also serves as Associate Director of the UMass–Lowell Center for Public Opinion. He is co-principal investigator of the Mexican Election Study, which is part of the Comparative Study of Electoral Systems (CSES). He received his PhD in Political Science from the University of Notre Dame. His research focuses on public opinion and comparative political behavior, with particular attention to how partisanship, affective polarization, and motivated reasoning shape voters’ attitudes and behavior in contexts of democratic backsliding. His work has appeared in Electoral Studies, International Journal of Public Opinion Research, Journal of Democracy, Perspectives on Politics, Public Opinion Quarterly, and Political Behavior, among other journals.

José Miguel Jaimes Prada is a political scientist and law student at Universidad del Rosario, Colombia.

Carlos Meléndez is a researcher at the Institute of Social Sciences of the University of Lisbon. He holds a PhD in Political Science from the University of Notre Dame (Indiana, United States). He was an associate professor at Diego Portales University (Chile) and a postdoctoral researcher at the Central European University – Democracy Institute (Hungary) and at the Center for Studies on Conflict and Social Cohesion (Chile). He has been a visiting professor at FLACSO-Ecuador, Universidad del Rosario (Colombia), and Pontifical Javeriana University (Colombia), among others. His research examines public opinion, political identities, support for the far right, and populist demand, utilizing survey data and experimental methods applied to opinion polls, with a comparative perspective between Latin America and Europe. His work has been published in journals such as the American Journal of Political Science, Comparative Politics, Democratization, Journal of Peace Research, Journal of Politics in Latin America, Party Politics, Political Studies, among others.

Manuel Meléndez-Sánchez is Postdoctoral Visiting Fellow at the University of Notre Dame’s Kellogg Institute for International Studies. His research examines the roots of democratic resilience, backsliding, and breakdown, with a focus on Central America and Mexico. His research has been published in the Journal of Democracy and the Annals of the American Academy of Political and Social Science. Born and raised in El Salvador, he holds a PhD in Political Science from Harvard University.

Lucio Rennó is Professor of Political Science in the University of Brasilia (UnB) (2006–present). He has been Provost of Graduate Studies (2021–2024) and Director of the Political Science Institute (2020). He received his PhD in Political Science from the University of Pittsburgh (2004). Renno was the President of the Federal District Planning Company (Codeplan) in the Federal District Government (2015–2018). He was Assistant Professor in the Center for Latin American Studies at the University of Arizona (2005–2006) and a postdoctoral fellow at SUNY – Stony Brook (2004–2005) and GIGA, Hamburg (2009–2010, 2011, 2013). He has been a visiting professor at Freie Univesität Berlin, holding the Sergio Buarque de Holanda Catedra in the LAI; at the Australian National University, Canberra; Yokohama National University; University of Texas, Austin; Vanderbilt University; and University of Oxford.

Cristóbal Rovira Kaltwasser is Professor at the Institute of Political Science at the Pontificia Universidad Católica de Chile and Director of the Laboratory for the Study of the Far Right (ultra-lab). He holds a PhD from Humboldt University of Berlin and completed postdoctoral research at Nuffield College (University of Oxford) as well as at the Social Science Research Center Berlin (WZB). In recent years, he has been a visiting professor at the Free University of Berlin, the Scuola Normale Superiore, Uppsala University, and Sciences Po. His research focuses on comparative politics, with particular emphasis on how extremist forces affect the functioning of democracy. Among other publications, he is the co-editor of Populism in Europe and the Americas (Cambridge University Press, 2012), The Resilience of the Latin American Right (Johns Hopkins University Press, 2014), The Oxford Handbook of Populism (Oxford University Press, 2017), and Riding the Populist Wave: Europe’s Mainstream Right in Crisis (Cambridge University Press, 2021).

Talita Tanscheit is professor in the Department of Social Sciences at the Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio) and an associate researcher at the Laboratory for the Study of the Far Right (ultra-lab). She holds a PhD from the Institute of Social and Political Studies at the State University of Rio de Janeiro (IESP-UERJ) and is Chair of the Steering Committee of the Standing Group on Latin American Politics at the European Consortium for Political Research (ECPR). Previously, she was a professor at both the Alberto Hurtado University (UAH) and the Federal University of Rio de Janeiro (UFRJ). Her main area of research is comparative politics, particularly subjects related to political parties and democracy in Latin America. Her work has been published in journals such as Nations & Nationalism, the Journal of Language and Politics, and the Revista de Ciencia Política.

Gabriel Vommaro is Professor of Political Sociology at the Universidad de San Martín and Researcher at the Argentinian National Research Council, CONICET. He received his PhD from the Ecole des Hautes Etudes en Sciences Sociales. His research focuses on political activism and political parties (mainly, on right-wing parties), political clientelism and the state, and political communication. His books include The Recasting of the Latin American Right (Cambridge University Press, 2024, edited with A. Borges and R. Lloyd), La era del hartazgo. Líderes disruptivos, polarización y antipolítica en América Latina (Siglo XXI, 2025, edited with G. Kessler), Conservatives against the Tide (Cambridge University Press, 2023), Diminished Parties. Democratic Representation in Contemporary Latin America (Cambridge University Press, 2021, edited with J. P. Luna, R. Piñeiro, and F. Rosenblatt); La larga marcha de Cambiemos (Siglo XXI, 2017), and Sociologie du clientélisme (La découverte, 2015, with H. Combes).

Lisa Zanotti is a researcher at the De- and Re-Democratization (DRD) research group of the Democracy Institute at Central European University (CEU), and an affiliated member of the Laboratory for the Study of the Far Right (ultra-lab). She previously served as Assistant Professor at Diego Portales University in Santiago de Chile and has held research positions at Tallinn University and the Universidad Autónoma de Madrid (Spain). Her research specializes in comparative politics, with a particular focus on party systems, populism – especially concerning the far right in Latin America and Western Europe – and processes of radicalization at the individual level. She has published in leading international journals, including Government and Opposition, Nations and Nationalism, and Political Studies, among others.