As an analyst of legal issues, she regularly collaborated in well-known television shows such as "Amigas y conocidas", El gato al agua, "España Directo" and "La mañana de La 1". It was precisely at a television gathering, where she met the Citizens Party President Albert Rivera. A voter of Citizens, Villacís began to collaborate with the party in September 2014, advising on local taxes, and she finally joined the party in early 2015. In February 2015 she held a meeting with far-right party Vox, where the later party offered her a position in the list for the 2015 regional election to the Assembly of Madrid but she preferred to maintain the commitment to Citizens. That same month, she ran as a pre-candidate in the Citizens' primary process to determine the party's Mayoral candidate for Madrid. She imposed over the other pre-candidate, Jaime Trabuchelli, commanding 60% of the votes.