Mexico's president sarcastically said that the U.S. should be called "Mexican America" after Trump's vow to rename the Gulf of Mexico the "Gulf of America."

President-elect Donald Trump said Tuesday that he would move to try to rename the Gulf of Mexico to the “Gulf of America.”

The Mexican president responded to President-elect Trump's contention that the sea should have a more U.S.-centric designation by showing a map from 1607 during a Wednesday press conference. The map, which predates the founding of the United States by more than 150 years, labels all of North America as "América Mexicana” (“Mexican America”).

The President of Mexico, Claudia Sheinbaum, wasted no time trolling President-elect Donald Trump, posting a vintage map showing that a large portion of what is now the United States of America used to be called “Mexican America.

President-elect Donald Trump plans to change the name of the Gulf of Mexico to Gulf of America. Will the world follow? What will maps say if he does?

For decades, history books and maps have labeled the big body of water that sits off the coast of the southern United States and Mexico as the Gulf of Mexico.

During a press conference, Sheinbaum shared her lighthearted idea while displaying the historic map. “Mexican America, that sounds nice,” she remarked, pointing to the depiction of North America under its early designation.

As is often the case with Trump, it’s unclear whether his remarks are to be taken at face value or if he's simply trying to stir the pot.