Ontario Premier Doug Ford ridiculed U.S. President Donald Trump’s order changing the name of Lake Ontario to Lake America. Read more.

Canadian Prime Minister Mark Carney and Ontario Premier Doug Ford quickly denounced Trump’s move and said Lake Ontario’s name was here to stay.

Trump’s executive order may change the name in the U.S., but Canada isn’t required to follow suit. Here’s who gets to decide and where the centuries-old name came from.