Both sides in the Lisbon Treaty debate are set to step up their campaigning over the coming days in a final push to convince voters of the merits of their arguments.
The vote takes place on Friday.
Yesterday, a Red C poll in the Sunday Business Post put support for the treaty at 55%, compared to just 27% of respondents who said they would be voting 'no'.
Eighteen per cent of respondents were undecided.
The Taoiseach, Brian Cowen, will be campaigning in Clare today, while Labour Party leader Eamon Gilmore will be visiting both Clare and Galway.
On the 'no' side, Sinn Féin leader Gerry Adams will be canvassing voters in Dublin city centre.