I'm sure the visit to Argentina and Cuba were arranged way before Trump got elected so its not "thumbing ones nose" at the US Gov in waiting. What would you suggest? Asking the US Gov if its offensive for our PM to visit where they do not approve?Also I have not heard him say anything except neutral comments designed to make it easier to get along with the new US administration.. so I don't know what you mean about comments he should keep to himself. Also you are surely aware that the Harper Gov already tied us into a trade deal with China that lasts 31 years.. does it make you feel better that Harper did it? As for the carbon tax.. it should go ahead. If the US wont do it and it puts Canada and other countries who adhere to the Paris agreement at a disadvantage each of those countries need to institute a carbon tax at the border on any products coming from the US to even the playing field. Here the "national treatment" clause in NAFTA should help us!