Within the Broad Front, she originally participated in the Vertiente Artiguista, a social democratic political sector, which was led by the politician and architect Mariano Arana, who was also the former Secretary of Housing, Mayor of Montevideo, and Senator of the Republic.

In the internal elections of 2009, Muñoz formed her own approval list, including the presidential candidate Marcos Carámbula, alongside Víctor Rossi.

In August 2011, the district attorney Diego Pérez asked for the imprisonment of Muñez, arguing that under her direction as Secretary General of the Mayorship of Montevideo, she facilitated the actions carried out by the Director de Casinos, Juan Carlos Bengoa, who in turn was accused in 2007.

[6] On the first of April in 2011, Muñoz assumed the title of the Comisión Honoraria de Lucha contra el Cáncer, or the Honorary Commission of Fighting against Cancer, taking the place of Óscar Magurno.

[7] In December 2014, after securing the election of Tabaré Vázquez for another presidency, it was announced that Muñoz would be at the forefront of the Ministry of Education and Culture (Ministerio de Educación y Cultura), the position which she still holds today.