RT Journal Article T1 Political polarization and emotion rhetoric in the US presidential transition: A comparative study of Trump and Biden on Twitter and the post-election impact on the public. T2 Polarización política y retórica de las emociones en la transición presidencial de Estados Unidos. Estudio comparado de Trump y Biden en Twitter e impacto postelectoral en la ciudadanía A1 Domínguez-García, Ricardo A1 Méndez-Muros, Sandra A1 Pérez Curiel, Concha A1 Hinojosa-Becerra, Mónica K1 Periodismo político - Estados Unidos AB The pictures of the US Capitol attack, on January 6, 2021, represent a before and after in a country marked by the culture of political polarization. Following a presidential campaign based on misinformation and accusations of electoral fraud by Republican candidate Donald Trump, the level of maximum polarization causes a climate of social rupture. Faced with this, the Democratic candidate and winner of the elections, Joe Biden, projects a discourse of institutional stability and legality as a strategy before public opinion. Two years later, the abrupt division of the US electorate is evident, with a significant percentage of Republican voters questioning the legitimacy of the electoral process. The objective of this research is to find out the strategies of political polarization deployed by Donald Trump and Joe Biden on Twitter in the 2020-2021 presidential transition period, as well as the public’s response. Based on a general sample of 1,060 tweets, a comparative content analysis methodology with a triple approach (quantitative-qualitative-discursive) i applied, based on the study of themes, emotions, and the ability to go viral of the messages of both political leaders. The results confirm a Trump’s speech defined by polarization, misinformation and the attack on the democratic system, relegating information from his presidential administration in the last months of his term to the background. On the contrary, Biden avoids confrontation and reinforces his legitimacy as president-elect, by announcing management measures of the future government. The engagement value of the social audience on Twitter is also added, with a position of support for the winner of the elections. PB Profesional de la información SN 1699-2407 YR 2023 FD 2023 LK https://hdl.handle.net/10630/35054 UL https://hdl.handle.net/10630/35054 LA eng NO Domí­nguez-Garcí­a, R., Méndez-Muros, S., Pérez-Curiel, C., & Hinojosa-Becerra, M. (2023). Political polarization and emotion rhetoric in the US presidential transition: A comparative study of Trump and Biden on Twitter and the post-election impact on the public. Profesional De La información, 32(6). https://doi.org/10.3145/epi.2023.nov.06 DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 19 ene 2026