REBEL TD Colm Keaveney claims Tanaiste Eamon Gilmore will use "whatever avenue" to oust him from his influential position as Labour Party chairman.
Mr Keaveney is due to chair a meeting of the Labour executive in Dublin tomorrow, and claims Mr Gilmore will present a legal report on his position at the meeting.
He said he believes the Tanaiste will use "whatever avenue to secure my removal as chairman of the party".
"From day one, my election has been a contentious issue for Eamon Gilmore," the Galway East TD told RTE's 'Morning Ireland'.
He said it is "ironic" he left the Labour parliamentary party for standing by "red line" election promises on child benefit.
He also wants an early party conference to settle the issue of his chairmanship.