I don't think Trump understands that when we open trade to other countries, we gain not just as exporters but as consumers. But then, what U.S. politician running for president does? Marco Rubio? Rubio argued a few years ago that he would favour getting rid of quotas on sugar imports if we got something in return. But we do get something in return: it's called cheaper sugar. And getting cheaper sugar, by the way, might have caused LifeSavers not to move from Michigan to Quebec.David might have added, we also get more exports automatically without political deals. When other countries sell us sugar, they get dollars, of every single one ends up buying US exports or invested in the US.
Nothing new. It's in Adam Smith. But nicely expressed. Economics needs good stories.