Public support for Fianna Fáil is now at its lowest point in nearly two years.
In a blow to Micheál Martin ahead of the local and European elections, the latest Red C/Business Post opinion poll shows the party has dipped two points to 14 per cent.
Sinn Féin is the most popular party at 27 per cent, a rise of two points.
Eamon Ryan's Green Party is down one point at just 3 per cent popularity.
Fine Gael saw its support increase by one point to 20 per cent, despite its change in leadership under Simon Harris and a hope that it would provide a much-needed boost to the party.
Support for Independent candidates has risen by two points to 19 per cent.
Labour and the Social Democrats are unchanged at 3 and 6 per cent respectively, while Aontú and Solidarity-People Before Profit are both down one point to 4 and 2 per cent.
