Editing Independent Democratic Union (section)

=== End of dictatorship (1988–1989)===
UDI strongly supported Pinochet's remaining in power in the [[1988 Chilean national plebiscite]]. After the "Yes" option was defeated and presidential elections were announced, the UDI joined [[National Renewal (Chile)|National Renewal]] and formed the "Democracy and Progress" alliance (''Democracia y Progreso''). [[Hernan Büchi]], the former Minister of Finances under Pinochet, ran for president for this alliance. The alliance also ran a common Parliament list. The UDI's option lost [[1989 Chilean presidential election|the 1989 presidential election]], this time against the center-left [[Coalition of Parties for Democracy|Concertación]]'s leader, the Christian Democrat [[Patricio Aylwin]].

In the 1989 parliamentary elections, the Independent Democratic Union obtained a 9.82% of votes in deputies (14 deputies out of 120) and 5.11% in the Senate (2 senators elected on 38). Jaime Guzmán won a seat as [[Senate of Chile|Senator]] for Western [[Santiago, Chile|Santiago]] constituency. Although Guzman took third place with only 17% of the vote, behind Christian Democrat [[Andrés Zaldívar]] and [[Party for Democracy (Chile)|Party for Democracy]] leader [[Ricardo Lagos]], the two main leaders of the Coalition of Parties for Democracy, the binomial system allowed Zaldívar's and his election and deferred Ricardo Lagos who got 30%.