A new opinion poll has shown a five-point swing against the Coalition in around four days of campaigning.
The Red C poll for tomorrow's Sunday Business Post shows Sinn Féin support up three points in a week, while Fine Gael is down 2%.
The poll of 1,008 adults was carried out between Monday and Thursday of this week, the first full week of campaigning.
It shows Fine Gael support at 28%, down by two points compared to a similar poll published midweek and down 3% since another one last weekend.
Labour meanwhile are unchanged at 8%, meaning the Coalition is some distance short of being returned with a majority.
Sinn Féin are the big winners, up three points to 20%, although that change is within the margin of error. Fianna Fáil are unchanged on 18%.
Independent candidates are on 16%, with the Social Democrats on 4%, the AAA/People Before Profit on 3%, the Greens on 2% and Renua on 1%.