The Independent Democratic Union is a conservative and right-wing political party in Chile, founded in 1983. Its founder was the lawyer, politician and law professor Jaime Guzmán, a civilian allied with Augusto Pinochet. Guzmán was a senator from 1990 until his murder by communist guerrillas on April 1, 1991.

Jaime Jorge Guzmán Errázuriz was a Chilean constitutional law professor, politician, and founding member of the conservative Independent Democratic Union party. In the 1960s, he strongly opposed the University Reform movement and became an active organizer of the Gremialist movement. Guzmán vehemently opposed President Salvador Allende and later became a trusted advisor of General Augusto Pinochet and his dictatorship. As a professor of Constitutional Law, Guzmán played a significant role in drafting the 1980 Chilean Constitution. He briefly served as a senator during the transition to democracy before being assassinated in 1991 by members of the communist urban guerrilla organization group, the Manuel Rodríguez Patriotic Front (Autonomous).