The most dramatic shift in Ibero-American judicial governance this week came from Buenos Aires, where President Javier Milei signed a decree of necessity and urgency (DNU) that dismantles key transparency mechanisms for appointing Supreme Court justices. The measure, agreed with Justice Minister Juan Bautista Mahiques and set for imminent publication, eliminates the public consultation and impugnation stages introduced by Néstor Kirchner’s 2003 decree, along with non-binding recommendations to consider gender balance, regional origin and professional specialisation. With only three of five seats filled on Argentina’s highest court, the government argues the changes will cut redundant steps and accelerate nominations. Viewed from the region, however, the move concentrates appointment power in the executive at a moment when judicial vacancies across the federal bench exceed 37 percent, raising sharp questions about the trade-off between efficiency and democratic oversight.

Across the Atlantic, Spain is pursuing a markedly different approach to judicial capacity. The government of Pedro Sánchez announced the largest-ever single call for judges and prosecutors: 700 new posts, of which 575 will be filled through competitive public examinations and 125 via the so-called fourth turn, reserved for experienced jurists. The expansion, hailed by Justice Minister Félix Bolaños as a historic transformation, aims to relieve chronic bottlenecks in a system where caseloads have long outpaced staffing. While Argentina’s decree strips away participatory filters, Madrid is reinforcing a merit-based, transparent selection model that, despite its own political controversies over judicial council appointments, preserves formal checks on entry to the career judiciary.

In Mexico, the Supreme Court is tightening internal rules to make justice more accessible rather than altering who sits on the bench. A new administrative agreement, in force since 11 June, obliges court personnel to respond to citizen petitions within 72 hours for urgent matters and no more than 45 days for others, while formally integrating 36 regional legal centres as intake points. The reform, championed by Chief Justice Hugo Aguilar Ortiz, reflects a growing institutional awareness that legitimacy rests not only on rulings but on the everyday experience of those seeking redress—a theme largely absent from Argentina’s decree.

Brazil’s Supreme Federal Tribunal (STF) is navigating a different set of tensions: internal cohesion and electoral power. A wing of the court, even with three justices sitting on the Superior Electoral Tribunal, is increasingly willing to bypass traditional electoral channels by accepting constitutional complaints that allow direct intervention in the 2026 election process. Simultaneously, Chief Justice Luiz Edson Fachin has formed a consultative study group on judicial reform, soliciting nominations from fellow justices to avoid the infighting triggered by his earlier code-of-conduct proposal. The dual dynamic—external assertiveness and internal fragility—underscores the STF’s pivotal but precarious role in Brazil’s polarised democracy.

Taken together, these developments illustrate a region where judicial institutions are being pulled in opposing directions. Argentina’s executive is reclaiming discretion over top-court composition, while Brazil’s top court is seizing a more direct electoral role, and Mexico is focusing on the quotidian quality of justice. Spain’s expansion, though less politically charged, offers a technocratic counterpoint. The common thread is a struggle to define what makes a court legitimate: speed, independence, representativeness or proximity to the citizen. For international observers, the Argentine decree will be the most closely watched test of whether efficiency arguments can mask a deeper erosion of checks and balances.