[citation needed] As a teenager, she participated in several organizations related to the Punk subculture and against the bullfights.

[1] She started her political life in the municipality of Rivas Vaciamadrid, where her family is strongly linked to the ruling United Left.

In 2007 she was elected to the city council where she was the Deputy Spokesperson of the United Left municipal group, and designated to the Executive Board as has been Councillor-head of the Departments of Culture, Festivals and Cooperation for Development.

In October 2014 she announced her intention to seek the nomination of United Left for the Presidency of the Community of Madrid in the open primary that would be held in November that year.

[5] On the primary Election held in 30 November Tania Sanchez obtained a landslide victory in the Primary election over the candidate supported by the party leadership Jose Antonio Moreno and minority Candidate Julian Sanchez Vizcaino.[6][n.