Are National a serious party?

Winston has announced that NZ First will be snubbing the upcoming constitutional stocktake, calling it "a road to nowhere". Which isn't much of a surprise really. While NZ First talks about the role of the Treaty on occasion, their policies on the matter are so ridden with historical revisionism and sheer untruth that it is clear that they're really only interested in using it as a stick to stir racial tension. The last thing they want is for people to sit down and develop a consensus which would limit their ability to do that.

The real question is whether National will sign up - and their answer will determine whether National is a serious party with an actual interest in debating the issues they've raised in the last year, or simply a group of racial stirrers like Winston.