The Movement of National Liberation (Spanish: Movimiento de Liberación Nacional) (MLN) was a Mexican leftist political party composed of numerous socialist, Marxist, and peasant activist groups.
The MLN stated as its priorities; regime change, release of political prisoners, solidarity with Cuba, municipal autonomy for unions and peasant organizations, opposition presence in Congress, weakened presidentialism, and undermined corporatist control.
[1][2] The Popular Socialist Party withdrew in December 1962 after rumors spread the MLN was planning to organize a new peasant movement outside the PRI to push for agrarian reform.
In January 1963, Lázaro Cárdenas announced the formation of just such a party, the Central Campesina Independiente (CCI) to attack the PRI's corruption and betrayal of peasant struggles.
In addition the issue of political prisoners, the release of Valentin Campa and Demetrio Vallejo, finally led Mateos to denounce the MLN, stating they had succumbed to communist infiltration.