Guv hits the nail on the head when it comes to the problem of allowing free flow of goods & capital but confining labour. It's high time the unions ditch their "jobs for life" mentality and start acting in the interests of their members by demanding that movement of labour be covered in trade deals- we got a bit of progress in NAFTA but not nearly as good as the deal the Euros have. Not likely to happen though, given the "closed shop" labour laws that force workers to pay into unions even when they act against them (any Canadian Airlines pilot can tell you what a forced-to-pay union is worth at the end of the day).
As for the comments about the yanks going after one-sided trade deals, Canada's been getting that sort of grief since Confederation. The only way out, I'm afraid, is to drive as hard a bargain as possible.
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Per dementia ad astra