In the lead-up to the September 7, 2025 legislative elections in Buenos Aires, Argentina's most populous province is experiencing tense negotiations to finalize electoral lists. The elections will renew half of the provincial legislature, with 23 Senate seats and 46 Deputy seats up for grabs. Various political factions are maneuvering to position themselves ahead of the vote. Former governors have entered the race aiming to counter Javier Milei, a prominent libertarian figure. The Frente de Izquierda (Left Front) has announced its full candidate list, featuring Nicolás Del Caño and Romina Del Plá. Meanwhile, a broad anti-Milei Peronist sector in Salta is calling for a united front for the October elections. The alliance between La Libertad Avanza (LLA) and the PRO party is finalizing its candidates, with Guillermo Montenegro confirmed as a candidate for senator in the 5th Electoral Section. Karina Milei is leading the effort to close candidacies for the LLA-PRO alliance. However, negotiations within the Peronist camp remain deadlocked, increasing tensions as the midnight deadline for official list submissions approaches. Notably, an unexpected former police officer leads the LLA list in the 3rd Electoral Section, positioning to challenge the Kirchnerist faction. Several local mayors have withdrawn from the LLA-PRO alliance, adding to the complexity of the electoral preparations. The official electoral timetable has been published, confirming the schedule for the upcoming vote.