President Trump threatened a significant tariff hike on the European Union and Mexico, two of the largest U.S. trade partners, on Saturday. NBC News’ Yamiche Alcindor has more.

President Donald Trump posted letters to the leaders of Mexico and the European Union, saying they had not done enough to head off the new tariffs.

Relying on Asian suppliers is no longer a safe bet for many factories in Mexico. Companies are racing to change, and they are being encouraged by the government.