TAOISEACH Enda Kenny's refusal to take part in debates on the Seanad showed a "throwaway, dismissive attitude" that turned people off his push to abolish the Upper House, Fianna Fail has claimed.
Niall Collins, the party's director of elections, says it is too early to call a result, but claims the trends are pointing to a No vote.
Mr Collins, a Co Limerick TD, said Mr Kenny came up with the idea of scrapping the Seanad "at a time when he was under pressure politically himself".
And he said the Taoiseach further damaged his cause by refusing to take part in debates.
"This throwaway, dismissive attitude that I don't want to debate any of other leaders in case I embarrass them, people don't like to see out of the leader of the country," Mr Collins said. "It's a serious issue, we're talking about the constitution here.
"There are serious messages in there for the Government."
By Fiach Kelly Political Correspondent