# PL secured most Senate seats and retained Chamber majority

*Politics. 34% certain. Monday, 5 October 2026*

> Speculative fiction assembled from prediction-market prices. This has not happened.

**The Senate map was fragmented, with PL winning the most seats and other parties capturing state races.**

On Monday the Liberal Party (PL) emerged as the party with the most seats in the newly elected senate. The same party also retained control of the Chamber of Deputies, confirming its hold on the lower house. Despite this national lead, the senate map showed a fragmented distribution of winners across the states.

In the northern state of Amazonas, Eduardo Braga secured the top senate seat. Rayssa Furlan won the senate race in Amapá, while Rui Costa topped the ballot in Bahia. Styvenson Valentim captured the first place in Rio Grande do Norte, and Teresa Surita did so in Roraima. Filipe Barros achieved the leading position in Paraná, adding to the varied regional outcomes.

In São Paulo, Guilherme Derrite finished first and André do Prado took the second senate seat. Benedita da Silva won the senate contest in Rio de Janeiro. Carlos Bolsonaro placed second in Santa Catarina, while Carlos Viana secured the second spot in Minas Gerais. These results illustrate the presence of multiple parties among the senate's top finishers.

The Federal District's senate race saw Bia Kicis finish in second place. Her position followed the leading candidate, whose identity was not among the listed alternatives. The outcome adds another non-PL figure to the senate's composition.

Nevertheless, PL's collection of seats forms the largest bloc within the upper house. The party's dual control of the Chamber and the senate's biggest group positions it to shape legislative agendas.

## Analysis

With control of the lower house and the largest bloc in the senate, the Liberal Party is positioned to drive the legislative agenda and pass priority bills without needing extensive cross-party support. Its dominance in the Chamber ensures that most proposals will clear the first legislative hurdle, while its senate bloc can influence debate and amendments.

The Senate's fragmented composition means that the PL cannot assume unchallenged authority in the upper Chamber Opposition senators from various parties will hold enough seats to affect votes on critical measures, requiring the governing party to negotiate and possibly form coalitions on contentious issues.

The state-level victories by candidates such as Eduardo Braga, Rayssa Furlan, and Benedita da Silva demonstrate that regional political dynamics remain diverse. These winners, representing parties other than the PL, will bring distinct policy priorities and regional interests to the national stage, shaping the balance of power within the senate.

Future legislative dynamics will depend on how the PL manages relationships with the non-PL senators who hold key seats. While the party's overall strength provides leverage, the need for consensus on certain reforms introduces uncertainty, especially on matters where the opposition bloc can block or amend proposals.

## What this was built from

- **Brazil Chamber of Deputies Election Winner**: PL, 66%; settles Monday, 5 October 2026 (polymarket). [Market](https://polymarket.com/event/brazil-chamber-of-deputies-election-winner)
- **São Paulo Senate Election: 1st Place**: Guilherme Derrite, 67%; settles Sunday, 4 October 2026 (polymarket). [Market](https://polymarket.com/event/sao-paulo-senate-election-1st-place)
- **Next Brazil Senate Election: Most Seats Held**: PL, 98%; settles Monday, 5 October 2026 (polymarket). [Market](https://polymarket.com/event/next-brazil-senate-election-most-seats-held)
- **Federal District Senate Election: 2nd Place**: Bia Kicis, 75%; settles Monday, 5 October 2026 (polymarket). [Market](https://polymarket.com/event/federal-district-senate-election-2nd-place)
- **São Paulo Senate Election: 2nd Place**: André do Prado, 59%; settles Sunday, 4 October 2026 (polymarket). [Market](https://polymarket.com/event/sao-paulo-senate-election-2nd-place)
- **Paraná Senate Election: 1st Place**: Filipe Barros, 34%; settles Monday, 5 October 2026 (polymarket). [Market](https://polymarket.com/event/parana-senate-election-1st-place)
- **Roraima Senate Election: 1st Place**: Teresa Surita, 61%; settles Monday, 5 October 2026 (polymarket). [Market](https://polymarket.com/event/roraima-senate-election-1st-place)
- **Amapá Senate Election: 1st Place**: Rayssa Furlan, 83%; settles Monday, 5 October 2026 (polymarket). [Market](https://polymarket.com/event/amapa-senate-election-1st-place)
- **Santa Catarina Senate Election: 2nd Place**: Carlos Bolsonaro, 53%; settles Monday, 5 October 2026 (polymarket). [Market](https://polymarket.com/event/santa-catarina-senate-election-2nd-place)
- **Amazonas Senate Election: 1st Place**: Eduardo Braga, 86%; settles Monday, 5 October 2026 (polymarket). [Market](https://polymarket.com/event/amazonas-senate-election-1st-place)
- **Minas Gerais Senate Election: 2nd Place**: Carlos Viana, 38%; settles Sunday, 4 October 2026 (polymarket). [Market](https://polymarket.com/event/minas-gerais-senate-election-2nd-place)
- **Rio de Janeiro Senate Election: 1st Place**: Benedita da Silva, 60%; settles Sunday, 4 October 2026 (polymarket). [Market](https://polymarket.com/event/rio-de-janeiro-senate-election-1st-place)
- **Bahia Senate Election: 1st Place**: Rui Costa, 81%; settles Monday, 5 October 2026 (polymarket). [Market](https://polymarket.com/event/bahia-senate-election-1st-place)
- **Rio Grande do Norte Senate Election: 1st Place**: Styvenson Valentim, 77%; settles Monday, 5 October 2026 (polymarket). [Market](https://polymarket.com/event/rio-grande-do-norte-senate-election-1st-place)