Turnbull government minister Fiona Nash has been caught up in the dual citizenship fiasco, referring herself to the High Court because of her Scottish descent.
Senator Nash – who is deputy Nationals leader to Barnaby Joyce – revealed in the Senate on Thursday night that she believes she is a dual UK citizen.
Like Mr Joyce, she says she will not stand down from her frontbench positions while the court considers her case.
Senator Nash has a Scottish father, giving her automatic citizenship by descent. She said she was previously assured she did not have it.
It caps a poor week for the Nationals which began with party leader Barnaby Joyce revealing he was a potential victim of the citizenship saga after extensive investigations revealed he inherited dual citizenship through his father, who was born in New Zealand.
In July Senator Mayy Canavan, a dual Italian citizen, quit the ministry and will not vote in the Senate until his case is resolved.
He, too, is a member of the Nationals.