Well, what happens with the short list is a prime ministerial mystery, and it is the Prime Minister's prerogative. However, I can tell you that every person who is on that short list is a person of distinction, high character and great quality, who could make an excellent contribution to the Supreme Court of Canada.
I would be surprised if partisanship played any role. If it did, it would be something quite aside from the already established, outstanding evaluation of somebody in terms of their legal ability, their character and their integrity.