The tariffs are likely to inflame tensions with one of the largest U.S. trading partners.

BRIDGEWATER, New Jersey (AP) — President Donald Trump on Saturday announced he’s levying tariffs of 30% against the European Union and Mexico. Trump announced the tariffs on two of the United States’ biggest trade partners in letters posted to his social media account.

The United States will start charging 30% tariffs on August 1 on products coming into the country from the European Union and Mexico, President Donald Trump confirmed in separate letters Saturday.