Could I just add a quick footnote.
This word “sovereignty” is a big word. It's used in many contexts. But what I think Canadians ought to understand is that while they have an absolutely legitimate concern about their sovereignty and their independence, essentially because they're the smaller partner, what they must realize is that there are groups in the United States, powerful politically, who raise serious questions about loss of sovereignty in dealing with Canada. So this issue in fact runs in both directions. What is remarkable is how the two governments have been able, while respecting the preferences of citizens on both sides of the border, to do what practically is necessary to have jointness. I think that's what we need to keep working on.