In 1961, Letts joined the "Acción Popular" party and was head of the Chancay Provincial Committee of Acción Popular, he participated in the III National Congress of Acción Popular held in Iquitos.
Letts joined the "Acción Popular" party and was head of the Chancay Provincial Committee of Acción Popular, he participated in the III National Congress of Acción Popular. This was in 1961. This Acción Popular was held in Iquitos.