Portugal's Constitutional Court Appointments Spark Political Standoff Between PS and PSD

Portugal's Constitutional Court faces a political standoff after the center-right Social Democratic Party (PSD) signaled it may exclude the Socialist Party (PS) from appointing judges to the country's highest constitutional authority—a move that breaks a 44-year informal pact and could complicate budget negotiations.

The dispute centers on three vacant judge seats at the Palácio Ratton, the Lisbon palace housing Portugal's Constitutional Court. Under parliamentary rules, filling these positions requires a two-thirds supermajority (154 votes), which has historically meant the two largest parties—PS and PSD—worked together. But the PSD, now governing without an absolute majority, is exploring an alliance with the far-right Chega party to secure the votes, effectively sidelining the Socialists.

Why This Matters

• Budget implications: The PS has warned it will sever political dialogue with the government if shut out, potentially affecting 2027 State Budget negotiations.

• Institutional balance: The proposed arrangement would reshape how judges are appointed to oversee laws affecting public health, labor rights, and social security.

• Historic shift: The informal agreement that has governed court appointments since 1982 may be ending, marking a significant change in Portugal's institutional practices.

How the Constitutional Court Works—and Why Balance Matters

Portugal's Tribunal Constitucional comprises 13 judges: 10 elected by parliament, and three co-opted by those 10. Their role is to strike down laws that violate the 1976 Constitution, including protections for the National Health Service (SNS), Social Security, and restrictions on unjust dismissal.

Since the court's creation in 1982, an unwritten "gentleman's agreement" ensured that the PS and PSD each nominated half the parliamentary-appointed judges, with mutual veto power. In recent years, the court has reviewed hundreds of laws, striking down significant legislation including measures affecting healthcare access and labor protections. This arrangement aimed to prevent any single government from controlling constitutional review—a safeguard against majoritarian overreach.

Now, with Chega holding 50 seats in the 230-member Assembly, the PSD is weighing whether to formalize the far-right party's presence in the judicial appointment process. The proposed formula: two judges nominated by PSD, one by Chega, leaving the PS with zero.

What Socialist Leaders Are Saying

Mariana Vieira da Silva, vice-president of the PS parliamentary group and former minister under António Costa, told Lusa news agency the move marks a significant shift in inter-party relations. She described it as a "new phase" chosen by the PSD rather than emerging from mutual agreement.

"If this decision is confirmed, it signals a rupture with the PS," she said. "Every effort José Luís Carneiro [PS leader] has made in recent months to bridge divides on structural issues enters a new phase from this decision—including budgets."

Vieira da Silva emphasized the institutional stakes, pointing to the court's role in overseeing constitutional protections for public healthcare, social security, and employment rights. She also invoked Prime Minister Luís Montenegro's campaign rhetoric, noting his repeated opposition to Chega in electoral campaigns and questioning how that position aligned with potential cooperation on constitutional court appointments.

The Threat to Budget Negotiations

According to reporting in Expresso newspaper, the PS is prepared to suspend political dialogue with the government if its court nominee is rejected. Without Socialist abstention or support, the minority PSD government could face challenges in passing the State Budget, risking fiscal complications.

The two leaders—Montenegro and Carneiro—met earlier this week to discuss the impasse, but no agreement emerged. The PSD has rejected an exclusive deal with the left, instead exploring partnerships with the Liberal Initiative (IL) and Chega to secure the necessary votes.

Constitutional Scholars Raise Concerns

Vital Moreira, a founding member of the 1976 Constituent Assembly and former Socialist MEP, expressed concern about the proposed arrangement on his blog Causa Nossa. He used strong language, describing the scenario as a potential "conspiracy against the independence of constitutional justice" and suggesting the President of the Republic consider calling new elections if the PSD proceeds.

Moreira's substantive argument centered on political balance. He noted that the PSD could have accommodated Chega by transferring one of its own two open seats rather than offering the PS's allocation. More broadly, he warned that breaking the existing arrangement could set a precedent: a right-wing coalition might eventually seek to control future judge selections when additional PS-quota vacancies arise, potentially reshaping the court's composition over time.

Institutional precedent matters in constitutional matters. Under the historical pact, neither the PS nor PSD could unilaterally control the court—a safeguard rooted in the assumption that neither would secure a two-thirds majority alone. That assumption is changing as parliament fragments.

How Portugal Compares to Europe

The standoff has prompted legal experts to compare Portugal's system with other European democracies. Most use long, non-renewable terms or staggered appointments to insulate constitutional judges from short-term political cycles. Germany's Federal Constitutional Court, for instance, splits appointments equally between the Bundestag and Bundesrat, with a 12-year non-renewable term, reducing year-to-year political pressure.

Portugal's system—requiring a two-thirds supermajority for each judge—was designed to force cross-party consensus. However, the rise of fragmented parliaments has shifted the dynamic: any coalition commanding 67% of seats can now freeze appointments indefinitely or impose its own slate. The Council of Europe's Venice Commission has repeatedly warned against politicized court appointments, emphasizing that merit-based selection and protection from removal remain essential to judicial independence.

The PSD's Position

The PSD parliamentary group has defended its approach, insisting that "all majorities are admissible" under parliamentary rules. The party argues that the current parliamentary composition—which includes Chega as the third-largest force—should be reflected in institutional appointments.

A PSD spokesperson told Lusa that the Socialists' claim to a "reserved seat" has no explicit constitutional basis. "The Assembly elects judges by a qualified majority. If the PS cannot build that majority, it's a reflection of its electoral result, not a breach of democratic procedure," the spokesperson said.

What Happens Next

The three vacancies remain unfilled, with another parliamentary vote expected in the coming weeks. If the PSD-Chega-IL alliance holds, the PS's nominee would be rejected, and the right-leaning coalition would secure all three seats.

At that point, the PS leadership must decide whether to follow through on its threat to suspend dialogue—a move that could create complications for the upcoming budget cycle. The President of the Republic, Marcelo Rebelo de Sousa, may be positioned to mediate or, if the crisis escalates significantly, consider other institutional options.

For now, the standoff underscores a broader shift in Portuguese politics: the informal norms that have stabilized democracy for four decades are under strain, replaced by more competitive dynamics in a fragmented parliament. How the Constitutional Court maintains its legitimacy through this transition remains uncertain—with implications for the court's role in reviewing legislation affecting residents' rights and protections under Portuguese law.