I believe that Donald Trump has made it clear that it will be America first.  The USA and Canada are trade competitors and it can be done in a friendly way while the USA eats Canada's lunch or otherwise.  Also, I think Trump would say that if Canada wants to put itself into an uncompetitive position by carbon taxes, that he approves and would like it if Canada would pay the American share while were at it.  It's a good start that Ontario and Quebec are going to pay cash to California in the cap-and-trade deal.  America likes that and it shows how friendly Canada is.