Sinn Fein's popularity has plummeted by five points according to a new opinion poll.
It now leaves them 18 per cent behind leaders Fine Gael.
After a promising surge in last month's poll, things seem to have changed dramatically for Sinn Fein.
The latest Red C opinion poll for the Sunday Business Post has them at 13 per cent - a decrease of five points.
It comes a fortnight after party leader Mary Lou McDonald posed behind a controversial banner reading "England get out of Ireland" at the St. Patrick's Day parade in New York.
Meanwhile, support for Fine Gael is unchanged at 31 per cent, while Fianna Fáil are on 25, up one point.
The Social Democrats, the Independent Alliance and the Green Party all sit on 3 per cent, with Solidarity-People Before Profit on two.
The Independents and Labour are unchanged on 15 and 5 per cent respectively, while Renua and Peadar Tóibín's new party Aontú are on less than 1 per cent.