PRO hits pause on LLA alliance, decides against merger in Congress

Right-wing party PRO will maintain its own bloc in Congress and will not merge with La Libertad Avanza (LLA), party members announced following a meeting on Wednesday.   Despite running with LLA in the past midterms and supporting President Milei’s economic agenda, PRO intends to maintain certain bargaining power with the government for legislative support. For the ruling party, this means that gathering votes in Congress may turn out to be slightly more uphill than expected after winning the midterm elections in October. “There has not been and there will never be [a merger with LLA] because PRO is an autonomous party, that will always do what is right above what is convenient,” national deputy María Eugenia Vidal told the press after the meeting on Wednesday. El PRO no se disuelve, no se mezcla, no se confunde. En el Congreso seguimos siendo Bloque PRO.Vamos a apoyar las leyes que ayuden al país, pero defendemos nuestra identidad.Porque un PRO fuerte es una garantía para que Argentina mantenga el rumbo del cambio. pic.twitter.com/UtNqz0wrJs— María Eugenia Vidal (@mariuvidal) November 12, 2025 PRO has been LLA’s main ally since the start of the Milei administration, helping the government pass major bills in Congress. However, their relationship has had its ups and downs, with recent months marked by tension amid their electoral alliance. After December 10, LLA will have 87 deputies, and PRO 16. If the merger had gone through, they would have been the largest interbloc in the chamber. With its own deputies, however, LLA can reach one third of the lower house, a key figure as it gives them the required numbers to back presidential decrees and block opposition initiatives — such as an impeachment. 🏛️LLA LLEGARÁ POR SÍ SOLO AL TERCIO DE BLOQUEO📌Con los 7 pases de diputados del PRO alineados con Bullrich a LLA, desde el 10 de diciembre de este año el oficialismo contará con 87 legisladores, lo cual le alcanza autónomamente para tener el estratégico tercio de la Cámara. pic.twitter.com/eNCxyo2eU2— Pablo Salinas (@SalinasPabloJ) November 3, 2025 An independent PRO The PRO met to discuss the future of the party following the two years of the Milei administration. Several PRO members insisted on the need to remain an independent party, a crucial point of contention as some fellow members have become increasingly close to LLA in detriment of their own party. PRO head and former Argentine President Mauricio Macri said that the party “has a lot more to give” and that’s why it “stays relevant.”  “This is an infinite battle. It never ends,” were his words, according to a party statement released online. Absent at the meeting was Diego Santilli, a high-profile PRO member who was a national deputy until Tuesday, when he was sworn in as interior minister. Santilli had led the LLA-PRO ballot for national deputies in Buenos Aires province in the elections, acting as the face of the parties’ alliance. However, after a cabinet reshuffle, Milei chose him to become minister, and Santilli will not take his seat in the lower house in December. Vidal said that while Santilli still belongs to PRO, “his decision to become interior minister is personal.” Vidal, who was Buenos Aires province governor between 2015 and 2019, said that from now on, PRO will support the government’s measures that are “good for people,” especially its fiscal and macroeconomic program, as well as the labor reform. However, she defended the need to invest in infrastructure and highlighted the importance of public healthcare.