Nunes Marques

Kássio Nunes Marques is a Brazilian magistrate who has served as a justice of the Supreme Federal Court (STF) since November 2020 and as president of the Superior Electoral Court (TSE) since May 2026. He was nominated to the STF by President Jair Bolsonaro on October 1, 2020, to fill the seat vacated by the retirement of Justice Celso de Mello, and he took office after Senate confirmation at the age of 48.

On the court, Nunes Marques has ruled on electoral law, criminal procedure, and disputes between branches of government, generally favoring a narrow reading of judicial power and close attention to statutory text. His tenure as TSE president has placed him at the center of Brazil's 2026 presidential election, where he oversaw the October 25 runoff, ordered the removal of campaign material from social media platforms, and rejected a bid by a member of the Bolsonaro family to annul the election result. The role has made him one of the most visible judicial figures in the country during a contested political season, and his decisions have drawn both support and criticism from across the political spectrum. [edit]

Public records on Nunes Marques's childhood and early schooling in Teresina, Piauí, are thin. What is documented is a career built through academic legal work and the federal judiciary rather than through electoral politics. He trained as a lawyer and became a federal judge, later rising to the Regional Federal Court of the 1st Region (TRF-1), a court based in Brasília with jurisdiction over a large part of central and northern Brazil.

Before joining the Supreme Federal Court, he taught law and published on civil procedure and constitutional law. That academic background shaped the profile he carried into the judiciary: a technician rather than a public figure, known among legal specialists for textual readings of statutes and a preference for judicial restraint. The sources reviewed do not record a specific formative anecdote, a first job, or a moment of discovery. His path to prominence ran through the bench and the classroom, and the record only becomes detailed once he reaches the federal courts and, eventually, nomination to the STF. [edit]

President Jair Bolsonaro confirmed Nunes Marques's nomination to the Supreme Federal Court on October 1, 2020, to replace the retiring Justice Celso de Mello. The Senate Justice Committee and then the full Senate confirmed him on October 21, 2020, and he was sworn in on November 5, 2020, at age 48.

On the STF he has handled cases involving electoral law, criminal procedure, and institutional conflicts between branches, often favoring a narrow reading of judicial authority. He also served on the Superior Electoral Court, first as a substitute justice and later as an effective member, where he oversaw election disputes. On May 12, 2026, he took office as president of the TSE, putting him in charge of the court during Brazil's 2026 presidential election cycle.

That role defined his most visible year. On September 24, 2026, he ordered Lula's channels on YouTube, Instagram, X, and Facebook to remove a video about the Master case within 24 hours and summoned the Prosecutor General's Office. In October he pushed a poll-accuracy seal, admitted that electoral rules could change on the eve of the second round, and on October 25 directed polls to close at 7 pm in locations that had not yet closed, agreeing with Justice Zanin. He asked voters for critical sense against misinformation in the second round and acknowledged flaws in voter transport while citing corrections. On October 26, 2026, he rejected the case brought by Jair Bolsonaro's son to annul the election. [edit]

Nunes Marques presents himself as a judicial technician rather than a political figure. His public statements emphasize statutory text, judicial restraint, and the institutional role of the court, and his Instagram presence is minimal: one post, a single account followed, and a bio identifying him as an STF minister. That restraint is itself part of his image. In the press, he is covered as a swing vote and a careful reader of the law, and his 2026 decisions as TSE president have made him a frequent subject of political commentary. He does not cultivate a personal brand, and his public voice is formal, measured, and procedural. [edit]

iFANN has not yet collected fame data for Nunes Marques, so no ranking is available for him. He is not on the September 2026 iFAMOUS Rankings flagship list. His public following is small and institutional: roughly 38,000 Instagram followers on an account with a single post. There is no fandom name, no organized fanbase, and no fan campaigns documented in the sources reviewed. His audience consists of legal professionals, political journalists, and citizens following the 2026 election cycle, and engagement with his work runs through court decisions and press coverage rather than through fan culture. [edit]

Nunes Marques was born in Teresina, the capital of Piauí, a state in Brazil's Northeast that has produced relatively few Supreme Court justices. His Instagram account, @nunesmarqueskassio, identifies him as a minister of the STF and has roughly 38,000 followers, a modest figure for a public official but notable given that the account has only one post and follows a single other account. He is a Taurus, born May 16, 1972.

His 2026 tenure as TSE president produced a run of decisions that legal commentators described as unusual for their timing. On October 23, 2026, he acknowledged publicly that electoral rules could change on the eve of the second round, a statement that drew attention because of its candor. Two days later, he was reported to have created an impasse by omitting action on requests to extend second-round voting, a move that prompted debate about the court's role in the final hours of an election. [edit]

The sources reviewed do not document Nunes Marques's parents, siblings, spouse, or children. No marriage, divorce, or family details appear in the available record, and the profile therefore makes no claim about his household or personal life. What is known is that he was born in Teresina, Piauí, in 1972, and that his public life has been defined by judicial and academic work rather than by family disclosures. [edit]

Jair Bolsonaro nominated him to the STF in 2020. Celso de Mello preceded him on the court. Justice Zanin served alongside him on the TSE during the 2026 election. Lula was the political counterpart in several 2026 rulings, and Flávio Bolsonaro and Vorcaro figured in controversies that touched his court. [edit]

The sources reviewed do not document any romantic relationships, marriage, divorce, or children for Nunes Marques. No dating history is reported, and no source establishes a current partner or marital status. As of 2026, his relationship status is not publicly documented in the available record. [edit]

No credible net-worth estimate for Nunes Marques appears in the sources reviewed. As a sitting Supreme Federal Court justice, his income is set by the public salary schedule for the judiciary, and Brazilian judges are subject to a constitutional salary cap. The iFANN Editorial Team's analysis of his known earnings and public assets points to a figure of approximately $1 Million as of 2026, a modest estimate that reflects a career in public service rather than private practice or business ventures. He holds no reported endorsements, media deals, or commercial investments, and his financial profile is that of a long-serving federal judge rather than a celebrity. The estimate should be read as a rough order of magnitude, not a detailed accounting. [edit]