The water bordered by the Southern United States, Mexico and Cuba will be critical to shipping lanes and vacationers.

Trump’s renaming of the Gulf of Mexico to the “Gulf of America” highlights the politics of map naming, sparking debates, social media snark, and mixed reactions globally and domestically.

President Trump's territorial assertions sparked a round of rethinking by mapmakers and teachers, snark on social media and sarcasm by at least one other world leader.