""Hermanito querido..." ("My dear little brother...") – familiar term used by then president Carlos Saúl Menem, usually before a sarcastic remark. Used now, with its particularly provincial sing-song, in a jokingly derogatory way, when explaining something seemingly obvious to someone else."
January 1, 1970
https://en.wikiquote.org/wiki/List_of_political_catchphrases