National's doubling down on its claim there's a "very real and growing possibility" of a hung Parliament and that would mean going back to the polls.
Christopher Luxon has defended the comments made at the weekend by the party's campaign chair and senior MP Chris Bishop.
Bishop has said it could happen if they can't strike a three way deal with the parties to form a government or there is an even split between the left and right parties.
So what are the legal ins and outs of forming a government?
Otago University Law Professor Andrew Geddis speaks to Lisa Owen.
