The next move is Trump's.  The last thing business appreciates is uncertainty and Trump's tweets are incendiary enough to give leaders of industry cause to fight back.  The first salvos have been fired.  The head of a U.S. communications firm said on radio this morning that there's a saying in Washington that no one wants to be first but everyone wants to be second.

The decision makers responsible for Canadian auto manufacturing (GM, Fiat and Honda,) are the first to stand up to Trump's tweets.  The dam will break when others see that the emperor has no clothes and the grown-ups in congress rein him in.