Fianna Fáil's candidate Jim Gavin has announced he is withdrawing from the Presidential Election "with immediate effect".
In a statement, he said recent days gave him "cause to reflect".
When I announced my intention to contest the presidential election I did so in a spirit of lifelong public service and a love of country. That has always been my sole motivation.
I believe deeply in this country, its dreams, its hopes and above all its people. The office of Uachtarán na hireann is the highest in the land and the pinnacle of public service. It is an office that must be untainted by controversy or distraction.
I always knew the campaign would be robust and challenging and anyone who knows me knows that I have never shirked from a contest. I have always sought to act in honour and good faith.
However recent days have given me cause to reflect.
I made a mistake that was not in keeping with my character and the standards I set myself. I am now taking steps to address the matter.
Thave also thought long and hard about the potential impact of the ongoing campaign on the wellbeing of my family and friends.
Taking all these considerations on board, I have decided to withdraw from the presidential election contest with immediate effect and return to the arms of my family.
Throughout this campaign I have been humbled by the encouragement and kind words I received.
So many people have gone out of their way to support me in so many ways, and I would like to express my sincere thanks to them. I truly hope you understand my decision and do not feel let down.