President Donald Trump made good on his promise to impose steep tariffs on America’s three largest trading partners — Canada, China and Mexico — citing a national emergency on the flow of fentanyl and undocumented immigrants into the United States.

The agreement involves significant commitments from Mexico regarding border security, which played a crucial role in this decision.

Mexican President Claudia Sheinbaum on Saturday ordered retaliatory tariffs in response to the U.S. decision to slap 25% tariffs on all goods coming from Mexico, as a trade war broke out between the two neighbors.