Exactly and even if he rips up NAFTA, trade still defaults to the WTO rules where the average tariff is quite low.  Now if Trump wants to pull this US out of the WTO, it will hurt the US a lot as other countries retaliate against them and throw the country into another major recession.  NAFTA for all its problems, is a good deal that benefits all three countries and Trump should learn with every deal you may some things you don't like but you follow the rules as the US is better with than without the deal.