The Confederation of Mexican Workers is the largest confederation of labor unions in Mexico. For many years, it was one of the essential pillars of the Partido Revolucionario Institucional, which ruled Mexico for more than seventy years. However, the CTM began to lose influence within the PRI structure in the late 1980s, as technocrats increasingly held power within the party. Eventually, the union found itself forced to deal with a new party in power after the PRI lost the 2000 general election, an event that drastically reduced the CTM's influence in Mexican politics.

The Institutional Revolutionary Party is a political party in Mexico that was founded in 1929 and held uninterrupted power in the country for 71 years, from 1929 to 2000, first as the National Revolutionary Party, then as the Party of the Mexican Revolution and finally as the PRI beginning in 1946.