He was the leader of the Christian Democratic Party and played a major role in the formation of the centre-left coalition FrePaSo.

At 25 years old, Auyero was elected as a provincial deputy in Buenos Aires Province, having gained his doctorate in law.

He led his grouping, 'Humanism and Liberation', into a new party formed with activist Graciela Fernández Meijide, Popular Democracy, which then joined with dissident Peronists in the creation of the Broad Front.

FrePaSo's ticket for the Presidency in 1995 of José Octavio Bordón and Álvarez came second with 33% and established itself as a major force.

On 17 April 1997, Auyero participated in the programme Hora Clave on Canal 9 presented by Mariano Grondona, appearing in a panel debate with government minister Eduardo Amadeo as well as journalist Néstor Ibarra and economist Enrique Szewach.