Fianna Fail's Sean Haughey has admitted he did not canvass for a Yes vote in the Marriage Referendum.
The party stalwart - who lost his seat in the 2011 election and is putting himself forward to contest the upcoming General Election in the newly formed constituency of Dublin Bay North - was on RTE Radio's 'Today' programme.
He told host Keelin Shanley that he felt he couldn't canvass for the marriage "with conviction".
He also refused to say how he voted on the issue.
After she quit Fianna Fail, Senator Averil Power told of her disappointment that some Fianna Fail TDs did not canvass for the Yes vote even though the party officially supported it.
If Averil Power remained in Fianna Fail, she would have found herself in competition with Sean Haughey for the party's nomination in Dublin Bay North.
Speaking about Sen Power's departure on RTE Radio, it was put to Mr Haughey to reveal what way he voted in the referendum.
"Well like many people, including the Taoiseach Enda Kenny, it was a long journey.
"For this one, I felt I couldn't canvass with conviction, that I wanted to listen to all the arguments, and I listened to the arguments. right up to polling day.
"I discussed it with my family. I'm passionate about my country, and on our society and how it should development and at the end of the day it's a secret ballot," he said.
Broadcaster Keelin noted he would not reveal how he voted and that he had confirmed he didn't canvass for the Yes vote.
"I'll be perfectly honest; I feel if you're going to go to people's doors and ask them, you need conviction, and for me, I wanted the luxury of sitting back and listening to all of the arguments.
"And I listened passionately right up until polling day.
"I don't think I let my party down in any way," he said.
He added that "referendums are diffierent" and that it was very difficult for party candidates or TDs "to canvass for referendums".
This one has all the hallmarks of a 'family spat' spilling into public view. Micheál Martin's backers generally agree that Senator Averil Power is a very able politician with a bright future. Her departure from the party, on the highest available dudgeon, has deprived Fianna Fáil of presence in two sectors where they were already extremely shy: women and Dublin.