 José Santiago Muñoz was an ardent Liberal, and propagandist.He defended the liberal credo as a journalist for the "El Pipiolo", "El Tizón Republicano", "El Monitor Araucano" and "El Canalla" newspapers.In 1824, Muñoz was elected a deputy for "San Carlos" (1824-1825), and in 1826 was reelected, this time for "Santiago" (1826-1827), being vice president of the chamber from January 8 to February 5, 1827.