The latest political opinion poll puts Fianna Fáil 4 points ahead of Fine Gael.
The RED C Poll for the Sunday Business post shows Fine Gael unchanged on 24% approval, while Fianna Fail are up two points to 28%.
Sinn Fein are up one point to 18% while Independents are down three points to 10%.
Labour are unchanged on 6%, while Solidarity People Before Profit and the Social Democrats are on 4%.
The Independent Alliance polled just 2%.