Early parliamentary elections were held in Greece on 8 April 1990. The conservative New Democracy party of Constantine Mitsotakis, was elected, defeating PASOK of Andreas Papandreou. In order to be able to command a majority of 151 in the 300-seat Parliament, New Democracy had to secure the support of Theodoros Katsikis, Democratic Renewal's sole MP. Shortly after Mitsotakis was given a confidence vote, the Supreme Special Court, after a mistake in seat calculation was detected, gave a 152nd seat to the coalition of New Democracy and Democratic Renewal.

New Democracy is a liberal-conservative political party in Greece. In contemporary Greek politics, New Democracy has been the main centre-right to right-wing political party and one of the two major parties along with its historic rival, the Panhellenic Socialist Movement (PASOK). New Democracy and PASOK were created in the wake of the toppling of the military junta in 1974, ruling Greece in succession for the next four decades. Following the electoral decline of PASOK, New Democracy remained one of the two major parties in Greece, the other being the Coalition of the Radical Left (SYRIZA). The party was founded in 1974 by Konstantinos Karamanlis and in the same year it formed the first cabinet of the Third Hellenic Republic. New Democracy is a member of the European People's Party, the largest European political party since 1999, the Centrist Democrat International, and the International Democracy Union.