Whether or not the tactic is successful remains to be seen.  But it is direct, incisive and will hurt the US in the same fashion the tax hurts Canadians, particularly BC softwood producers.  This is the kind of response that will catch Trump's attention.  

And it is light years ahead of any response from the federal government.  Junior's dilly-dallying and waffling are seen as signs of weakness in Trump's world.  The longer this drags on, the more the tax becomes the status quo.  Christie Clark should go for it, go for it now and stand firm.  Even if it is an irritant to the federal plan, perhaps it will spur the feds to action.  And it will hurt Trump and expose to the USA his one-sided trade vision for the fallacy it is.

Or we could elect the NDP and have John Horgan respond by, uhh, well, uhh . . . he must be allowed to do something isn't he?  Surely the United Steelworkers will let him make some feeble, token attempt that he can point to as a success, won't they?  Anything?