Catarina Martins is a prominent left‑wing politician who served as national coordinator of the Bloco de Esquerda ("Bloco de Esquerda") for many years and remains an influential figure on the Portuguese left. The Bloco is a progressive, parliamentary party that pushes for social justice, workers' rights and strong welfare policies; it has been a regular coalition or support partner in left‑leaning governments and shapes debates on issues like housing, health and foreign policy.