On 10 September 2018, the then-incumbent mayor of Madrid Manuela Carmena announced that she would run for re-election in the 2019 Madrid municipal election under a new and different platform than the Ahora Madrid party under which she had successfully contested the 2015 election.[17][18] Carmena wished for her candidacy to be formed by a trusted team made up of members of her municipal government. This clashed with attempts from Podemos and United Left–Madrid to impose party member quotas in the lists, bringing a number of outsider partisan figures in place of Carmena's allies.[19][20]
On 12 November 2018, all Podemos members in the City Council of Madrid (Rita Maestre, José Manuel Calvo, Jorge Castaño, Esther Gómez, Marta Gómez Lahoz, and Paco Pérez) chose to withdraw from the party's scheduled primary election in the city and instead announced their intention to contest the municipal election within Carmena's planned platform as independents, prompting Podemos to suspend them from party membership.[21][22] On 22 November, Carmena officially launched her independent Más Madrid platform, which she defined as "innovative, independent, democratic and progressive" and formed "by individuals, not parties".[23][24]
On 17 January 2019, it was announced that Carmena and Íñigo Errejón, Podemos candidate for president of the Community of Madrid and one of Podemos' founders, had agreed to launch a joint platform to run at the 2019 Madrilenian regional election.[25][26][27][28] Podemos leader Pablo Iglesias announced later that day that he no longer considered Errejón as the party's candidate in the region for placing himself "outside Podemos" by renouncing the party's trademark, and that Podemos and IU would contest the regional election on their own even if that meant competing against Más Madrid and Errejón.[29][30] Podemos leaders also urged Errejón to resign his seat in the Congress of Deputies,[31] considering his move as "deceitful" and "a betrayal" of the party.[32] On 21 January, Errejón vacated his seat in the Congress[33][34] but still called for Podemos, IU, and Equo to join the Más Madrid platform.[35]
Some media outlets, such as El Confidencial, had tentatively predicted at first that Más Madrid would become a grouping of electors, as it aimed to distance itself from the umbrella of any political party.[36][37] On 7 February 2019, it was formally registered as a political party in the interior ministry.[38] The primary election process for electing the party's candidates was scheduled for 12–18 March, with Más Madrid establishing a difference in the method of selecting the candidates intended to assume executive responsibilities and the rest of the list, with the former being elected through a Borda count (with n=57 both in the municipal and regional list) and a Dowdall count for the latter.[39]
On 1 July 2019, the party elected its regional appointed member according to its results in the regional elections, with Eduardo Rubiño being the chosen Senator.[42] On 22 September 2019, party members decided that Más Madrid should take part in the November 2019 Spanish general election called after the failure of government negotiations between the Spanish Socialist Workers' Party (PSOE) and Unidas Podemos (UP).[43] Party candidates would run under the Más País banner, officially launched on 25 September, which would include alliances with other parties from across Spain such as Equo, Coalició Compromís or Chunta Aragonesista. Several days later, the party name was officially changed in the register of political parties to Más País.[44] On 10 July 2020, the membership of Más Madrid endorsed Mónica García's list to coordinate the executive board of Más Madrid, with Pablo Gómez Perpinyà and Manuela Bergerot as additional co-coordinators.[45] Days later, the Rita Maestre-led list was chosen to coordinate the municipal executive board of the party in Madrid.[46]
On 5 March 2021, after alleging discrepancies with the current party leadership, especially with Rita Maestre, four Madrid councillors (Marta Higueras, José Manuel Calvo, and Felipe Llamas y Luis Cueto, whow as close to Carmena), announced their departure from the party to become part of the group of non-aligned councilors.[47][48] Following the 2021 Madrilenian regional election, Más Madrid became the second force in the Assembly of Madrid, becoming the first party aside from the PP and the PSOE to do so in the region, as it surpassed the PSOE as the most voted left-wing force in the region. Europe Elects summarized that "Más Mádrid voters are typically younger than PSOE's, less skewed to the left in the income distribution than UP's and more educated than both PSOE and UP."[12]
On 10 March 2022, the Constitutional Court of Spain supported to the complaint filed by Más Madrid after the 2021 elections, in which the party was excluded from the Bureau of the Madrid Assembly despite having obtained 15% of the votes in favor of Vox, which obtained 8% of the votes, establishing that article 23.2 of the Constitution was violated as the "right of access to the position under conditions of equality was violated in this case due to the lack of proportionality of the agreement reached, which left a party (Más Madrid) that had obtained almost double the percentage of votes out of the Parliament's management body than another that did achieve a position (Vox)".[49] However, this declaration had mere declarative effects, as the legislature already concluded when Isabel Díaz Ayuso called for the 2021 snap elections.
