The latest Sunday Times/Behaviour & Attitudes opinion poll suggests that Fine Gael and Fianna Fáil are neck and neck at 27%, as both parties mull the timing of the next general election.
This is a two point increase for Fianna Fáil.
According to the poll, Sinn Féin is up three points at 20%. There has been no change for both the Green Party and the Labour Party, who are on 6%.
Solidarity/People-Before-Profit is down one point at 3%. The Independent Alliance is down two points at 2%, while Social Democrats is also down one point at 1%.
Independent/others are down one at 9% support.
The survey of voters was carried out over a 13-day period up until 17 December.
The margin of error in this poll is 3.3%.