Mexican President Claudia Sheinbaum turned the tables on U.S. President-elect Donald Trump’s talk about renaming the Gulf of Mexico as the “Gulf of America.” In what appeared to be a deadpan joke, Sheinbaum suggested the United States be known as “Mexican America” during a press briefing on Wednesday.

The incoming president offhandedly outlined his newest administration priority – changing the name of the Gulf of Mexico. Here’s what to know about the Gulf, the name and the possibility it might change.