In 2018, their support grew to 21 seats, and he served as Vice President in the first government of Juanma Moreno, a coalition between the People's Party (PP) and Cs.

Born in Sanlúcar de Barrameda, Province of Cádiz, Marín began a degree in Labour Relations but terminated it in 1981 to work in his family's jewellery company.

[2] His first nomination was on the AP's list for the 1983 elections, and he said that Sanlúcar's best mayor was the Communist José Luis Medina Lapieza (1979–1987) for doing "a lot when there weren't many resources".

[3] In 2006, Marín reacted to a refuse collection strike by founding CIS, which took three council seats in 2007 and formed government with the PSOE, breaking the PP majority.

He initially opposed the investiture of PSOE leader Susana Díaz as regional president or joining a coalition,[6] before reaching an agreement to support her in the fourth vote in June.