David Cunliffe doesn't know whether he has the support of the majority of the Labour caucus.
Mr Cunliffe officially resigns from his role as leader of the Labour Party today.
He told Radio New Zealand this morning that he wasn't certain he has the support of the majority of the Labour caucus, but that wasn't influencing his decision to contest the leadership.
"It is my strongly held view that at the end of the day we need to bring the caucus and the party together," he said.
He said there were a "wide range of views expressed" in a seven-hour caucus meeting following the election result.