The president is laying down the law, and tariffs are a legitimate tool to engage in national security policy as well as economic policy.

President Donald Trump has the power to rename the Gulf of Mexico to the Gulf of America, but whether people will call it that is an open question.

The change will only be visible to U.S. users. Those in Mexico will still see “Gulf of Mexico,” while those in the rest of the world will see both names on the map.