Yolanda Díaz is galvanising the left in Spain

Stephen Burgen

Yolanda Díaz, the deputy prime minister and a lifelong member of the Communist party, is heading Sumar (Unite), a platform to the left of the prime minister, Pedro Sánchez, that plans to put up candidates at the general election due on 10 December.

On Saturday, 2,000 people filled the Auditori in Barcelona to hear Díaz speak, while a further 1,000 were turned away. She made her entrance to pounding, Rocky-style music and a standing ovation alongside Ada Colau, the Barcelona mayor and a leading supporter of the Sumar project….