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.

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

Trump’s territorial assertions, in line with his “America First” worldview, sparked a round of rethinking by mapmakers and teachers, snark on social media and sarcasm by at least one other world ...