A new political opinion poll out this evening delivers Sinn Féin its largest-ever setback in a single month.
The Behaviour and Attitudes poll for The Sunday Times shows the party down six points to 17%, their lowest result since Mary Lou McDonald took over as party leader.
Fine Gael is up one point to 31%, Fianna Fáil up two to 29% and Labour down one to 5%.
The Taoiseach's personal satisfaction rating is unchanged at 48%, while Fianna Fáil leader Micheál Martin pulls ahead, up one to 50%.
Ms McDonald has also followed her party's lead, slipping back four points in the satisfaction ratings to 44%.
The poll was conducted among 911 Irish voters between December 6 and 18.