National Opposition Union was a Nicaraguan wide-range coalition of opposition parties formed to oppose president Daniel Ortega's Sandinista National Liberation Front (FSLN) in the 1990 election. Its candidate Violeta Chamorro eventually won the race. UNO traced its origins back to the Nicaraguan Democratic Coordinating Group, which was formed in 1982 by different opposition groups. At the time of the election, of the UNO coalition's fourteen political parties, four were considered conservative, seven could be characterised as centrist parties, and three – including Nicaragua's Communists – had traditionally been on the far left of the political spectrum.

José Daniel Ortega Saavedra is a Nicaraguan politician who has been the 58th President of Nicaragua since 2007. Previously he was leader of Nicaragua from 1979 to 1990, first as Coordinator of the Junta of National Reconstruction from 1979 to 1985, and then as the 54th President from 1985 to 1990. During his first term, he implemented policies to achieve leftist reforms across Nicaragua. In later years, Ortega's left-wing radical politics cooled significantly, leading him to pursue pro-business policies and even rapprochement with the Catholic Church. However, in 2022, Ortega resumed repression of the Church, and has imprisoned prelate Rolando José Álvarez Lagos.