While President Donald Trump put threatened tariffs on Mexican avocados on pause, the U.S. government plans to put a nearly 21% duty on fresh Mexican tomatoes starting July 14. A duty — like a tariff — is a tax on imports, and this one would impact the 4 billion pounds of tomatoes the U.S. imports from Mexico each year.

It's actually more popular in the United States than in Mexico. And it may have helped tip the American Civil War in favor of the Union.