Donald Trump's increasingly strident approach to relations with Canada is provoking fear about the potential consequences north of the border and questions about just how serious the U.S. president-elect actually is.

US President-elect Donald Trump has once again threatened to impose substantial tariffs on Canada saying he intended to use "economic force" to acquire its neighbour to the north.While ruling out use of military force to do so,

Because Canada and the United States, that would really be something. You get rid of that artificially drawn line, and you take a look at what that looks like, and it would also be much better for national security,