Complex sentence: Fernández and Cobos won in the first round, and Cobos became Vice President of Argentina; he was replaced by pro-Kirchner Justicialist candidate Celso Jaque as governor.
Split into simpler sentences: Fernández and Cobos won in the first round and Cobos is now Vice President of Argentina. He was replaced by pro-Kirchner Justicialist Celso Jaque as governor.