Former Fianna Fáil TD Liam Lawlor is due to resume his cross-examination of property developer Tom Gilmartin at the Mahon Tribunal today.
Mr Lawlor interrupted his questioning yesterday to allow the Taoiseach, Bertie Ahern, to give evidence.
The former politician has already been criticised by tribunal chairman Judge Alan Mahon for taking so long to question Mr Gilmartin, but he has insisted that he has to be thorough in order to expose the full facts.
In evidence yesterday, Mr Ahern admitted that he may have attended a "chit chat" gathering between government ministers and Mr Gilmartin in Leinster House in February 1989.
He had previously insisted that he believed no such meeting took place.
Speaking afterwards, Fine Gael leader Enda Kenny said, taken with Mary O’Rourke’s evidence earlier this week, the admission was a further blow to Mr Ahern’s credibility and "showed his aversion to frank and truthful answers".
However, speaking as he left Dublin Castle yesterday evening, the Taoiseach said he had enjoyed giving his side of the story.