If Massa wins the runoff, Peronism will need more than twenty opposition deputies to ensure the minimum quorum of 129 deputies to deliberate and debate laws. The lower house renews half of its seats every two years.
La Libertad Avanza (LLA), led by Javier Milei (29.9%), who will compete with Massa in the runoff on November 19, had only 3 deputies since 2021, including the candidate himself, but on Sunday he won another 35 seats, adding up to 38 .
The second force in the lower house will continue to be the center-right coalition Together for Change (JxC), whose candidate Patricia Bullrich (23.8%) was left out of the runoff. The bench will have 93 deputies (it put 55 in play and only retained 31).
An eventual alliance of the LLA deputies with those of JxC, such as the one proposed immediately after the elections by Milei, would ensure them a tight majority in the lower house against Peronism.
The composition of Deputies is completed with 7 dissident Peronists, 6 from provincial parties and 5 from the left.
In the Senate, of 72 seats (three for each of the 23 provinces and three for the Autonomous City of Buenos Aires), Peronism displaced JxC as the first minority by securing 34 seats (it had 31). The quorum to deliberate is 37 seats.
Bullrich’s right-wing coalition, on the other hand, lost 9 senatorial seats and came second, with 24.
Also in the Senate, the great advance was made by Milei’s LLA, which two years after its founding will enter the upper house for the first time with 8 seats, ahead of other dissident Peronists (3) and provincial parties (3).
Reaching the minimum quorum to deliberate in the Senate (37 seats) will depend on cross alliances between the different groups.