The PP would obtain between 125 and 130 senators and Vox between 15 and 22 if both parties run separately in the general elections on November 29, according to the Sigma Dos survey for El Mundo, published on October 19. In that scenario, the two parties, along with UPN, would total between 141 and 155 representatives, below the 161 seats that correspond to three-fifths of the Upper House.
The survey contemplates that a coordination of candidacies between PP and Vox could allow them to reach that threshold. The 161 senators are the necessary figure to promote the renewal of four positions of the Constitutional Court that are pending new appointment.
Estimation of seats in the Senate
| Party | Senators by autonomous designation | Elected senators | Estimated total |
|---|---|---|---|
| PP | 23 | 102-107 | 125-130 |
| Vox | 5 | 10-17 | 15-22 |
| UPN | — | 1-3 | 1-3 |
The absolute majority of the Senate is at 134 seats. The three-fifths of the Chamber correspond to 161 senators, a figure that PP, Vox, and UPN would not reach even at the upper end of the estimate if they run separately.
The scenario with coordinated candidacies
The survey indicates that PP and Vox could optimize their representation if they coordinate their candidacies in certain provinces, through shared lists or withdrawal of candidacies. The goal would be to concentrate votes to increase the chances of obtaining seats.
| Scenario | Estimated result | Threshold of 161 senators |
|---|---|---|
| PP and Vox separately, along with UPN | 141-155 seats | They would not reach it |
| PP and Vox with coordinated candidacies | No single figure specified in the text | They could reach it |
Among the constituencies where the survey indicates that coordination could be useful are the three provinces of the Valencian Community; Cádiz, Córdoba, Granada, Huelva, Jaén, and Sevilla, in Andalusia; the two provinces of Extremadura; Huesca and Teruel, in Aragon; Asturias; Guadalajara, Balearic Islands, and the two Canary Islands provinces.
The joint candidacy of the left
The survey estimates that Senate of Progress, the joint candidacy of the PSOE and the parties of the Frente Amplio, would obtain between 89 and 96 senators. If the PSOE ran alone, the range would be between 73 and 79 representatives.