On February 21, 2026, four left-wing political parties in Spain—Sumar, Comunes, IU, and Más Madrid—will publicly announce their alliance aimed at strengthening the leftist space in Spanish politics, particularly to counteract the influence of the PSOE. This coalition effort has been in the works as these parties have been collaborating more closely over the past few months and are eager to present a united front to the electorate. The event is expected to set the groundwork for their cooperative strategies leading up to the elections.

As part of this initiative, the parties have also focused on engaging with the public to highlight their shared goals and vision for a progressive government. The exact details of the event, including which leaders will speak, are still being finalized. However, the parties involved are aligned in their desire to revitalize the left's representation in Spain's political landscape and expand their voter base ahead of the elections.

The coalition signifies a strategic move to consolidate leftist support, aiming to provide voters with a cohesive alternative to the current political environment dominated by the PSOE and other center-right parties. Their collaboration could influence upcoming political dynamics and potentially reshape electoral outcomes if they successfully unite their constituents and present clearly articulated goals.