Speaking after both leaders signed the agreement in front of cameras, Sánchez called on other parliamentary forces to "join us in advancing and not to block us."

Iglesias said a "progressive government" focused on social and feminist policies that fights climate change would make Spain a "point of reference" in Europe.

"I believe that we need to start talking about Spain in this world as a point of reference that offers security to vulnerable social sectors, the best vaccine against the rise of the extreme right in Europe," he said.