If I may, I think if you look at the border as a wall--and we talked about this before--when we talk about infrastructure we talk about doors through that wall, access points. The reality is that if your door is jammed, you're not going to be able to get into your house, and the more doors you have, the easier it is to get into the house and the easier it is to get out of the house.
The reality is that Canadians want to trade with the United States. The reality is that our trade grows every single year, and it is not just big business. When the trucks go over, they carry the produce of the farmers, they carry the produce of labourers and small business. But when you have doors that are creaky, when you don't have enough doors, you create the proverbial bottlenecks with all the attendant frustration, with all the attendant costs.
So you're quite right when you say infrastructure is the problem, but from our perspective infrastructure is the problem because (a) there are not enough doors, if I can put it in those terms, to manage that pressure to want to trade, and (b) the doors that are there, the infrastructure that is there, is fast becoming obsolete.