Sinn Féin Tables Irish Unity Bill to Mandate Green Paper

Sinn Féin tabled the Planning for Constitutional Change Bill in the Dáil on July 7, 2026, seeking to compel the Taoiseach to produce a Green Paper on the implications of constitutional change within 18 months and establish a Citizens' Assembly. Mary Lou McDonald, leader of Sinn Féin, described the legislation as a political test for coalition parties and argued that formal preparation is essential to avoid the disorder seen during Brexit.

The Government of Ireland announced its opposition to the bill, with Taoiseach Micheál Martin labeling the proposal not credible. Martin argued that the bill mirrors unsuccessful independence campaigns, specifically citing the 2014 Scottish effort, and asserted that reunification requires a focus on reconciliation rather than arbitrary deadlines. Tánaiste Simon Harris echoed this sentiment, stating that constitutional change cannot be driven by timelines, although he noted that Fine Gael intends to produce its own unification blueprint by November.

Sinn Féin deputy leader and Northern Ireland First Minister Michelle O’Neill warned that opposing the bill would send a negative message to citizens in the North. Other political figures offered mixed views; Fianna Fáil TD Pat Gallagher suggested he might support the bill if granted a free vote, while Aontú leader Peadar Tóibín contested McDonald's cost estimates for reunification, placing the annual expense at €3-4 billion. The government is scheduled to vote against the bill this Wednesday.