Question: Who formed the rival group to the Argentinian group founded by a President of Argentina overthrown in a "coup d'état"?
Sentence (from "Kirchnerism"): Kirchnerism (Spanish: "kirchnerismo" ] ) is an Argentinian political group formed by the supporters of the late Néstor Kirchner, president of Argentina from 2003 to 2007, and of his wife Cristina Fernández de Kirchner, president from 2007 until 2015.
Relevant evidence: Yes