with Córdoba governor José Manuel de la Sota to form the United for a New Alternative alliance. Massa sought to appeal to centrist voters in an election disputed by the Peronist Daniel Scioli and the centre-right conservative Mauricio Macri, and focused his campaign on the fight against corruption, climate change, and development through renewable energy sources. In the first round of voting, on 25 October 2015, Massa was the third-most voted candidate with 21% of the vote, trailing behind Scioli and Macri, who went on to dispute the presidency in the second round. In the 2017 legislative election, Massa's Renewal Front joined forces with progressives Margarita Stolbizer and Victoria Donda to form the 1País ("1Country") electoral coalition. Facing the end of his term as national deputy, Massa and Stolbizer ran for Buenos Aires Province's seats in the National Senate. The senatorial bid was, however, unsuccessful, as the 1País list landed third in the election behind Cambiemos and Unidad Ciudadana. Frente de Todos and presidency of the Chamber Ahead of the 2019 general election, Massa made public his intention to once again run for President and launched "Alternativa Federal", a coalition with other non-Kirchnerist members of the Justicialist Party such as Miguel Ángel Pichetto and Juan Manuel Urtubey. However, following the announcement of Cristina Fernández de Kirchner that she would not run for President, but would instead back Alberto Fernández, Massa stood down from the race and pledged his support for the newly formed Frente de Todos, a coalition of Peronist parties and alliances, both Kirchnerist and non-Kirchnerist. He was then nominated to run for a seat in the National Chamber of Deputies as the first candidate in the Frente de Todos list in Buenos Aires Province. The Frente de Todos list won in a landslide in Buenos Aires Province, easily securing Massa's seat in the Chamber. Upon taking office on 4 December 2019, he was elected as president of the Chamber, succeeding Emilio Monzó. As president of the Chamber of Deputies, Massa introduced modifications to the chamber statute to guarantee gender parity in parliamentary commissions, and splitting the commission on Family, Women, Children and Adolescence into two separate commissions for Family and Childhood and Women and Diversity. During the COVID-19 pandemic and subsequent lockdown in Argentina, Massa's administration sought to lower the costs of parliamentary proceedings by suspending legislative aides and restricting mobility benefits for deputies. In December 2021, Massa