PSB Opens Negotiations to Form Federation With PDT

Overview

• The PSB's National Directorate unanimously authorized talks with the PDT on Thursday, Nov. 12, 2026, and empowered the party executive to negotiate possible inclusion of other progressive parties.
• Under Brazil's federation rules the two parties would act as a single legislative bloc for at least four years, allowing them to sum votes to meet the cláusula de desempenho and share public party funds and free TV/radio time.
• If PSB joins the PDT arrangement the combined group would rise to about 33 deputies in the Chamber of Deputies, increasing committee leverage and bargaining power in Congress.
• The decision leaves a previously discussed larger federation with Solidariedade, PRD and Avante on hold and exposes internal tensions, including threats of defections from PDT senator-elect Marília Arraes over control and state commands.
• Next steps require internal party referendums and homologation by the Tribunal Superior Eleitoral, and PSB leaders say they will not submit a list of ministerial demands to President Lula as part of the talks.