I would say trade, but I think the bigger issue is the whole rules-based, liberal international system, the architecture, whether we're talking about the World Trade Organization, the United Nations.... This stuff is all now under a bit of siege. Countries like Canada and Mexico have been the beneficiaries. We need to be working together with other like-minded democratic countries to shore up the system.
So yes, NAFTA, the North American economic accord, is the immediate challenge, but I think the bigger challenge we face is that of the operating system under which our two countries have done quite well and thrived, and that we now have to invest in as well, with other like-minded nations.