A Yes vote to Nice Treaty supported by IFA and ICMSA
IFA deputy president Ruaidhri Deasy told the Forum on Europe in Ennis, Co Clare, it was doing so because it is important the EU continues to function effectively as new member states join.
He said a second No vote by the Irish people would cause a constitutional crisis in the EU, and Ireland would lose goodwill and influence built up over the past 30 years.