Relax.  Trump's tough words are all show in the runup to the 100 day milestone, all meant to show that Trump the bully can get Canada and Mexico to do his bidding and be willing to renegotiate NAFTA.  Or so Trump claims, we'll have to see what that eventually means. Given Trump's attention span, Canada doesn't have much to worry about. Of course, Canada wants to re-negotiate a comprehensive trade deal that covers thousands of issues.  The sooner we get Trump down in the weeds, the more we can rest easy that the plethora of interest groups in the United States will be at each other's throats over maintaining their advantages or taking care of their grievances. Each will have their own pipeline into Congress and the White House, and Canada has been assiduously courting anyone who matters. This soap opera will drag on for years.

Now, North Korea, that is a much different kettle of fish, truly scary.