Since at the time that O'Donojú had left Spain, the Cortes was considering greatly expanding the autonomy of the overseas Spanish possessions, O'Donojú proposed to negotiate a treaty with Iturbide on the terms of the Plan of Iguala.
Cum, atunci când O'Donojú părăsise Spania, Cortesul luase în considerație o mare extindere a autonomiei posesiunilor de peste mări, O'Donojú a propus negocierea unui tratat cu Iturbide pe baza prevederilor Planului de la Iguala.