Labour leader Andrew Little has now been served with defamation proceedings by National Party donors and hoteliers Earl and Lani Hagaman.
The Hagamans confirmed in a statement they had now commenced defamation proceedings against Mr Little in the High Court and they had been served on Mr Little.
The defamation suit relates to comments Mr Little made about a management contract Mr Hagaman's company, Scenic Hotel, was awarded to manage the Matavai Resort on Niue. That was awarded a few weeks after Mr Hagaman donated $101,000 to the National Party during the 2014 campaign.
The Hagamans gave Mr Little a deadline to retract his comments and apologise last month, but Mr Little refused.
"As we said earlier, the reasons we're taking defamation action have been widely reported in the media and I won't be repeating his allegations that Earl and I find hurtful, highly offensive and totally false. We will now clear our names in court", Lani Hagaman said.