He began his activities as a union leader in the ranks of the Regional Confederation of Mexican Workers, supported by a group known as "the little wolves". Years later he joined forces with Vicente Lombardo Toledano and together they founded the Confederation of Workers of Mexico, the CTM. During the six-year term of President Lázaro Cárdenas, Fidel Velázquez achieved consolidating himself as the great leader of the principal worker's group of Mexico. Starting from 1950 he figured out how organize, maintain and consolidate the corporate structure of the political party PRI and in the last years of his life, he was a witness to the decline of presidentialism characteristic of this party.—Clío TV