The Taoiseach says he has no intention of re-opening the Moriarty Tribunal in the wake of the fresh revelations surrounding former Minister Michael Lowry.
A taped conversation from 2004 between the now Independent TD and a land agent suggested that Mr. Lowry did not declare a payment for tax.
He now says that payment was tax compliant.
"Casts doubt over truthfulness"
In the Dáil the Fianna Fáil leader says the revelations cast doubt on co-operation with the Moriarty Tribunal and on the truthfulness of evidence given before it.
"What's before us now is material that has emerged into the public domain, which - at the very minimum - casts doubt over the truthfulness of the evidence that was provided to the Tribunal" Michael Martin said.
But Enda Kenny says the Tribunal reported 2 years ago and he rejected calls for a revisit of the issue by the inquiry.