Former Conservative Party stalwarts Brent and Sue Reid are severing all ties with the beleaguered party.
They are blaming ex-leader Colin Craig and his former press secretary for disappointing "ordinary, hardworking New Zealanders" and corrupting a ready-made conservative network.
Mr Reid ran as a Conservative Party candidate in Wairarapa in the 2011 and 2014 general elections, seeking to boost the Conservative's party vote percentage.
Mrs Reid said they were "sticking their necks out" in criticising the party because they asked people to trust the brand during the election.
It was a brand now soured for them, with Mr Craig stepping down as leader last week in the face of zero support from his board and talk of "inappropriate" actions with his press secretary Rachel MacGregor, who controversially resigned two days before the election.