"It came down to about 67,000 votes so it was very close," Helen Clark Foundation executive director Kathy Errington told The AM Show on Tuesday. "Any number of things could have swung it. It's very hard to campaign in favour of something that is illegal because it is very hard for people to come out and say that they're doing it, and that they like to do it and they don't want to stop. "There's a whole lot of reasons that campaign was very, very tricky. Nonetheless it is what it is - the result is there and we did reject that proposed legal framework."