Spanish left-wing parties failed to agree on a unified Senate candidacy by the deadline, as territorial disputes and time constraints derailed negotiations, *La Vanguardia* reported on Friday.

The push for a single left-wing Senate slate, initially driven by the ruling PSOE to prevent the conservative PP from securing an absolute majority in the upper house, collapsed amid disagreements over regional representation. Sources within the Frente Amplio coalition admitted that efforts had been consumed by parallel talks for lower-house candidacies, particularly the stalled negotiations with Podemos. A Socialist source noted that the breakdown in broader left-wing unity had diminished incentives for a Senate pact.

Tensions escalated earlier this week when Podemos’ regional leaders bypassed national negotiators, directly contacting autonomous branches of Izquierda Unida to explore separate deals in 10 regions. IU’s federal coordinator, Antonio Maíllo, publicly rejected the move, insisting his party would only negotiate through Frente Amplio. “IU va a negociar desde el Frente Amplio porque es una organización seria, honesta y leal,” Maíllo told TVE, reinforcing the coalition’s stance.

The impasse leaves the left divided ahead of the Nov. 29 general election, with parties now preparing arguments to avoid blame for the rupture. In Aragón, a last-minute agreement was reached between Chunta Aragonesista, Izquierda Unida, and Movimiento Sumar to form a joint lower-house candidacy under the name CHA-Frente Amplio Aragón, though Podemos remains outside the pact. Similar regional pacts were finalized in the Balearic Islands and Canarias, but Valencia’s Esquerra Unida rejected a proposed alliance with Compromís, which was finalizing its own deal with Podemos.