Pablo Iglesias, leader of Unidas Podemos (UP), gave up his seat in the national parliament this week and will step down as deputy prime minister by the end of the month. It follows his announcement last week that he will head the UP electoral list in Madrid regional elections on 4 May.
All the parties have been finalising their electoral lists this week in what promises to be a high-profile campaign fought on clear ideological lines.
Former spokesperson in Valencia for Ciudadanos, Toni Cantó, made headlines this week when he signed up to the PP's Madrid candidate list under Isabel Diaz Ayuso.