The member-states of the European Union by the European party affiliations of their leaders, as of 1 January 2004.
Prior to 1 May 2004 the European Union had fifteen members. On that date ten new member states were admitted. This article describes the party affiliations of the leaders of eachmember-state represented in theEuropean Council from the beginning of 2004 until 1 May. The list below gives the political party that eachhead of government, orhead of state, belonged to at the national level, as well as theEuropean political alliance to which that national party belonged. The states are listed from most to least populous. More populous states have greater influence in the council, in accordance with the system ofQualified Majority Voting.
During the period in question only two changes of government occurred: in Greece and Spain, and taken together these left the overall balance of party affiliations in the Council unchanged.
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