A new opinion poll suggests that support for Fine Gael and Labour has increased.
More than 1,000 voters were surveyed between Monday and Wednesday last for the Sunday Business Post RED C poll.
With a spring election on the horizon, more voters are undecided about how they will vote.
Some 15% have not made their minds up - that is up five points since last month.
But when they are excluded, Fine Gael is up one point and now stands at 32%. This continues a steady rise for the party throughout the year.
Labour too is up - the party support is measured at 9%.
Fianna Fáil, however, is down two points to 17%. That is the exact level of support it won in its worst ever election showing in 2011.
Sinn Féin is up one point to 19% and overtakes Fianna Fáil as the biggest opposition party.
Independents and other parties are down two points to 23%. Within that figure - Independents get the nod from 14% of voters.
The Anti Austerity-People Before Profit Alliance is on 3%.
The Green Party, Renua and the Social Democrats all stand at 2% support.