Galway West Fianna Fáil TD Éamon Ó Cuív has said his party needs a new leader and a "change of direction".
Mr Ó Cuív said Fianna Fáil was in danger of disappearing and the party had lost touch with its support base in recent times.
Speaking on RTÉ's Today with Claire Byrne, he cited the party's general election performance and subsequent opinion poll findings as evidence of what he has previously called an "existential crisis".
Prior to the formation of Government, the former minister called for coalition discussions with Sinn Féin, saying voters had clearly indicated they did not want to see Fine Gael back in office.
This morning Mr Ó Cuív said discussion on the party's future among members had been stymied by the Covid-19 pandemic and restrictions on regular meetings.
He said the party needed to examine recent opinion poll findings and alter the direction it was taking.
Part of this problem, he said, is because the party membership has gotten old and has not renewed itself.
He said the party leadership sold the coalition "very, very hard" and he was the only person who consistently spoke against the idea.
He warned that if Fianna Fáil continued in its current trajectory, Sinn Féin and Fine Gael will dominate the next election.
Mr Ó Cuív said he disagreed with Taoiseach Michael Martin on a number of issues.
He would not be drawn on who he thought the new party leader should be, adding that he has no interest in the position.
