Campaign Against an EU Constitution (CAEUC) was a coalition left-wing political parties, organisations, trade unionists and individuals in Ireland, formed in 2005 to campaign against the anticipated European Union Constitution

Treaty establishing a Constitution for Europe

The Treaty establishing a Constitution for Europe , , was an unratified international treaty intended to create a consolidated constitution for the European Union...

 referendum. The Irish referendum on the issue did not materialise when the constitution was rejected in a constitutional referendum in France and a consultative referendum in the Netherlands (though it had previously been approved in Spain and in Luxembourg by referendums.)

The Campaign against the EU constitution remained in existence, and campaigned against the Treaty of Lisbon

Treaty of Lisbon

The Treaty of Lisbon of 1668 was a peace treaty between Portugal and Spain, concluded at Lisbon on 13 February 1668, through the mediation of England, in which Spain recognized the sovereignty of Portugal's new ruling dynasty, the House of Braganza....

 in Ireland in 2008, alongside Sinn Féin

Sinn Féin

Sinn Féin is a left wing, Irish republican political party in Ireland. The name is Irish for "ourselves" or "we ourselves", although it is frequently mistranslated as "ourselves alone". Originating in the Sinn Féin organisation founded in 1905 by Arthur Griffith, it took its current form in 1970...

, Libertas

Libertas Ireland

Libertas Ireland was a political party in Ireland. It contended the 2009 European Parliament elections in Ireland under a common banner with Declan Ganley's Libertas.eu...

 and various pro-life

Pro-life

Opposition to the legalization of abortion is centered around the pro-life, or anti-abortion, movement, a social and political movement opposing elective abortion on moral grounds and supporting its legal prohibition or restriction...

 groups, on both left and right. The constitutional amendment which was required to enable ratification of the treaty was rejected in the first referendum held in June 2008, but passed in the second referendum held in October 2009.

Affiliates to CAEUC

Organisations affiliated to CAEUC included, Peace and Neutrality Alliance

Peace and Neutrality Alliance

Peace and Neutrality Alliance is an Irish anti-war grouping and a lobby group which campaigns to protect Irish neutrality. It was involved in a number of campaigns such as those against the Iraq war, against the use of Shannon Airport by the US military, and against the Republic of Ireland...

 (PANA), People's Movement

People's Movement (Ireland)

People's Movement is an Irish pressure group which campaigns on a number of issues such as protecting Irish neutrality and against greater European Union integration...

, Socialist Party

Socialist Party (Ireland)

The Socialist Party is a socialist political party active in Ireland. It is a member of the Committee for a Workers' International .Formerly known as Militant Tendency, then Militant Labour, it adopted the name The Socialist Party in 1996. From their foundation in 1972 until the 1980s, members of...

, Sinn Féin

Sinn Féin

Sinn Féin is a left wing, Irish republican political party in Ireland. The name is Irish for "ourselves" or "we ourselves", although it is frequently mistranslated as "ourselves alone". Originating in the Sinn Féin organisation founded in 1905 by Arthur Griffith, it took its current form in 1970...

, Irish Anti-War Movement

Irish Anti-War Movement

The Irish Anti-War Movement is an organisation which campaigns against wars around the world. Recent campaigns have been against wars such as the Sri Lankan Civil War and the Gaza War, and most prominently in recent years against the Iraq War and the use of Shannon Airport by the US military.The...

, Workers' Party of Ireland

Workers' Party of Ireland

The Workers' Party is a left-wing republican political party in Ireland. Originating in the Sinn Féin organisation founded in 1905 by Arthur Griffith, it took its current form in 1970 after a split within the party, adopting its current name in 1982....

, éirígí

Éirígí

-External links:*...

, Irish Republican Socialist Party

Irish Republican Socialist Party

The Irish Republican Socialist Party or IRSP is a republican socialist party active in Ireland. It claims the legacy of socialist revolutionary James Connolly, who founded the Irish Socialist Republican Party in 1896 and was executed after the Easter Rising of 1916.- History :The Irish Republican...

, Community & Workers Action Group, Irish Socialist Network

Irish Socialist Network

The Irish Socialist Network is a democratic socialist organisation formed in 2001. It is a campaigning organisation which works actively to fight for the rights of Irish workers and to help build a socialist Ireland. It is based in Belfast and Dublin...

, Socialist Workers Party

Socialist Workers Party (Ireland)

The Socialist Workers Party is an Irish Trotskyist political party.-Foundation and growth:The SWP was originally founded in 1971 as the Socialist Workers Movement by supporters of the International Socialists of Britain living in Northern Ireland, who had previously been members of People's...

as well as a number of individuals.

CAEUC also liased with similar bodies in other European countries such as ATTAC in France and Austria.