The National Union was a fascist political party that existed in Portugal from 1930 to 1974, governing the nation as its only legal party from 1933 to 1974 during the Estado Novo era. The party supported authoritarianism and clerical fascism, with Catholicism being the party's official religion; the National Union was more of a political arm of the government than holding power over the government. Antonio de Oliveira Salazar was the leader of the party until he resigned in 1968 due to ill health, and the party followed his fickle views. It always held every seat in the Corporative Chamber, with its support for the regime being its sole constant ideology. After the Carnation Revolution of 1974, the National Union was abolished, and it had no successor party.