Loyal Fianna Fail servant Willie O’Dea has threatened to leave the party after four decades.
Mr O’Dea said he may run as an Independent Dail deputy, rather than support the party in another coalition government anchored by a confidence and supply deal.
The politician, who has celebrated 40 years as Fianna Fail TD in his native Limerick, criticised his party leader and Taoiseach Micheal Martin.