The Unitarian Democratic Coalition (portuguese: Coligação Democrática Unitária or CDU) is an electoral and political coalition between the Portuguese Communist Party (portuguese: Partido Comunista Português or PCP) and the Ecologist Party "The Greens" (portuguese: Partido Ecologista "Os Verdes" or PEV). The coalition also integrates the political movement named Democratic Intervention (portuguese: Intervenção Democrática or ID)
The coalition was formed for the first time in 1987 in order to run to the simultaneous election for the European Parliament and for the Assembly of the Republic, the portuguese parliament in July 19th of the same year.
Electoral scores achieved by CDU
| Year
| Type of Election
| Voting
| % of Voting
|
| 1987
| European Parliament
| 646640
| 11,5%
|
| 1987
| Portuguese Parliament
| 685109
| 12,2%
|
| 1989
| European Parliament
| 594961
| 14,4%
|
| 1989
| Local
| 633682
| 12,8%
|
| 1991
| Portuguese Parliament
| 501840
| 08,8%
|
| 1993
| Local
| 689928
| 12,8%
|
| 1993
| European Parliament
| 339283
| 11,2%
|
| 1995
| Portuguese Parliament
| 504007
| 08,6%
|
| 1997
| Local
| 643956
| 12,0%
|
| 1999
| European Parliament
| 357575
| 10,3%
|
| 1999
| Portuguese Parliament
| 483716
| 09,0%
|
| 2001
| Local
| 557481
| 10,6%
|
| 2002
| Portuguese Parliament
| 378640
| 07,0%
|
| 2004
| European Parliament
| 309406
| 09,1%
|
| 2005
| Portuguese Parliament
| 432009
| 07,6%
|
- Note that the Local election result reports to the result in the Municipal Chamber only and does not include the voting in Lisbon where the CDU parties run in coalition with the Socialist Party.
