Serra ran 2nd in the Más Madrid list for the May 2019 Madrilenian regional election, and renovated her seat at the regional legislature. Following the September 2019 presentation of the nation-wide Más País project for the 10 November 2019 general election, she communicated her renouncement to her seat in the Assembly of Madrid on 7 October 2019 in disagreement with the way the platform was working, in addition to Más País intending to run against En Comú Podem in Barcelona, which Serra was opposed to.