Sinn Féin has lost support and is now just one point ahead of Fine Gael, according to the latest opinion poll.
The RED C poll for the Business Post suggests that Sinn Féin's support fell by four points, compared to last month, to 23%.
In May 2022, the party stood at 36%.
At 22%, Fine Gael has increased its support by two points, the survey suggests - a four point gain since Simon Harris took over as party leader.
Fianna Fáil's support increased slightly, by one point, to 15% while support for independent candidates remains unchanged at 19%.
Support for the Social Democrats has dropped by one point, down to 5%.
Both the Green Party and Labour stand at 4%, an increase of one point each.
People Before Profit-Solidarity has also increased by one point to 3% and Aontú has dropped one point down to 3%.
RED C interviewed a random sample of 1,021 adults online between Friday 17 May and Wednesday 22 May.
