Juan Simeón Vidarte Franco-Romero (Llerena, 8 May 1902 - Mexico City, 29 October 1976) was a Spanish lawyer and socialist politician.
He joined the Madrid Socialist Group (Spanish: Agrupación Socialista Madrileña) of the PSOE in 1930 and was deputy secretary of its Executive Committee from October 1932 to April 1939.
[1] During the Civil War, and as a member of the Executive Committee of the PSOE, which was already totally controlled by the centrist faction, as well as a personal friend of both Indalecio Prieto and Juan Negrín, he had governmental responsibilities from the formation of Francisco Largo Caballero's first government in September 1936.
[6][7] The PSOE expelled Vidarte and a number of additional party members, such as Negrín, through a note published in El Socialista on 23 April 1946.
[8]) Exiled in Mexico and cut off from socialist organisations, he devoted himself to various commercial and academic activities and to writing his memoirs.