Fianna Fáil has sustained a significant drop in support in the wake of the Dáil voting controversy, according to the latest Sunday Business Post/Red C opinion poll.
It also suggests an increase in support for Fine Gael - with now an eight-point gap between the two parties.
The survey of 1000 voters, carried-out over an eight-day period up to last Thursday, indicates Fine Gael is on 32%, up three points on the previous poll last month.
Fianna Fáil are down by four points to 24%, while Sinn Féin drops 1 to stand on 11% support.
No change for the Green Party who are at 7%, while Labour is down two points on 4%.
The Independent Alliance has gained one point to stand at 4%, while Solidarity-PBP remains unchanged at 1%.
The Social Democrats are on 2%, up one, while Independents and others are unchanged at 13%.
Aontú register in the poll at 1%, up one since September.
The margin of error in this Sunday Business Post/Red C poll is plus or minus 3%.