Yes, those are excellent questions.
I want to point out one technical point.
The 75% and 12% numbers you pointed to are only of those who think the relationship will be fundamentally different, which is about half of Canadians. Another half of Canadians say they think it's going to be business as usual. We're only looking at the very sizeable 50% of Canadians or so who think the relationship's going to be fundamentally different.
I'd be careful with the favourable and unfavourable. I believe those ratings, where now the plurality of Canadians have a favourable rating of the United States, are in fairly stark contrast to some of the other data, for example the 70-odd percent who say the United States is our best friend.