Prime Minister Bill English has confirmed National's intention to work with United Future and the Act Party in September's election - encouraging his party's supporters to vote for David Seymour and Peter Dunne.
"We are encouraging National supporters to give their electorate vote to Act candidate, David Seymour, in Epsom, and United Future candidate, Peter Dunne, in Ohariu - and their party vote to National," he said today.
"To be clear, we want to increase our party votes in those electorates and that's what our National Party candidates will be working hard to do."
Mr English said he had already made it clear that if National is re-elected his preference is to continue working with Act, United Future and the Maori Party.
"While we don't always agree, our four parties have maintained a stable and successful Government since late 2008 and we would like to see that continue for the benefit of New Zealanders.
"New Zealand's political stability over the past several years has given this country a consistent economic advantage over many other countries we compare ourselves with."
Mr Dunne faces a serious challenge from Labour candidate and former Police Association president Greg O'Connor in his Wellington Ohariu electorate.
The Green Party is not standing a candidate in Ohariu. In 2014, Dunne won the seat by 710 votes, defeating then Labour candidate Virginia Anderson. National's candidate Brett Hudson got 6120 votes.
Mr Seymour, the MP for Epsom and Act leader, received 15,966 votes in 2014, defeating National MP Paul Goldsmith, who got 11,716 votes.
The election will be held on September 23.
