[1] Manrique resigned from the Navy as a captain in 1958 to start a daily newspaper in opposition to President Arturo Frondizi, Correo de la Tarde.

He hosted the television public affairs interview program Comentario Político from 1965 until the show's curtailment by order of hard-line Interior Minister Francisco Imaz.

[1] The head of a military junta at the time, President Alejandro Lanusse appointed Manrique Minister of Social Policy in 1971.

[3] Manrique actively supported the March 1976 coup and many of his Federalist Party colleagues were therein appointed to local government posts, including 78 mayors.

Remaining editor-in-chief of Correo de la Semana, Manrique died in Buenos Aires from complications related to lymphoma, in 1988.