Complex sentence: Córdoba Province, where Governor José Manuel de la Sota broke with the president after being elected with her endorsement and where the acrimony between these Peronist factions was probably most acute, fielded former Governor Juan Schiaretti as the head of his Lower House party list.
Split into simpler sentences: Córdoba Province, where Governor José Manuel de la Sota broke with the president after being elected with her endorsement, is where the acrimony between these Peronist factions was probably most acute. De la Sota fielded former Governor Juan Schiaretti as the head of his Lower House party list.