Burn every bridge. Rather than confine yourselves to countless articles and thousands of angry posts complaining about how the U.S. has cheated Canada out of every agreement ever signed between the two countries that no one outside of Canada ever sees, make overt moves and send a signal to Washington in true Duarte style.
Sooner or latter there will be an incident between the U.S. and China with Canada in an awkward position. 
You're more dependent on the U.S. than is any other country in the world. You cannot have that relationship and embrace China to the obscene extent that Canada has,  abandoning what little of your Canadian values that actually exist as reality and not myth and think  you're not going to end up between a rock and a hard place.