5. COOLer heads and the future of NAFTA
Despite all these disputes, experts stress this trade relationship is still one of the best in the world.
In fact, the two countries are so interconnected now, when trade disputes erupt sometimes American companies will side with Canadian companies and against U.S. lawmakers.
For example, Canadian meat producers disputed a U.S. law that required them to label where the cattle was born, raised and slaughtered. Canadians said the law discriminated against its meat from being sold in the U.S. and took the case to the WTO.
The WTO sided with Canada, and last December, Congress repealed the country-of-origin-labeling law. American meat producers -- whose business is intertwined with Canada -- actually supported their counterparts in Canada, arguing the regulation was too burdensome.
As for Trump's proposal of tearing up NAFTA, many American and Canadian experts say that it's not worth it to renegotiate or end the agreement. The three countries that are part of the agreement are so enmeshed with each other that untangling all that integration would be detrimental to trade and economic growth.
"It would be disastrous to renegotiate," says Robert Feenstra, an economics professor at UC-Davis. "It would have a disastrous impact on the U.S.-Canada trade relationship.