The Progressive Party (Spanish: Partido Progresista) was one of the two Spanish political parties that contended for power during the reign of Isabel II (reigned 1833–1868).
It was to the left of the opposing Moderate Party (Spanish: Partido Moderado) but also characterised itself as liberal.
It was the party of the exaltados, veinteañistas or progresistas, heirs of the Trienio Liberal ("liberal triennium") of 1820–1823, whereas the Moderate Party represented the doceañistas who traced their roots to the Spanish Constitution of 1812.
On this last matter, their position was somewhat milder than popular sovereignty, in that it did not necessarily call for the universal franchise.
[2] Like their Moderate opponents, they supported the monarchy of Isabel II, particularly against the Carlist pretenders.