Trump’s move deepens a rift between two North American countries that have suffered a debilitating blow to their decades-old alliance.

President Donald Trump started his week with the devastating news of deadly floods in central Texas while also negotiating a peace deal with Israeli Prime Minister Benjamin Netanyahu. CNN’s Kaitlan Collins reports on a week that also saw a reciprocal tariffs deadline move to August and questions over who ordered a Ukraine weapons pause.

The European Union braced on Friday for a possible letter from U.S. President Donald Trump, outlining planned duties on his largest trade and investment partner after a broadening of his tariff war in recent days.

The U.S. has sanctioned Myanmar's military junta and refused to acknowledge its rule, so Mr. Trump's personal letter to its leader was welcomed, despite the subject.

President Donald Trump has sent out tariff letters to seven smaller U.S. trading partners in his first batch of import tax announcements of the day.

President Donald Trump has again delayed a tariff deadline. His back and forth on the policy spurred TACO accusations. What does it mean?

The letter reiterated Trump’s complaints about dairy quotas, fentanyl and the U.S. trade deficit, which is mostly fueled by American refineries’ thirst for Canadian oil. His social media post caused the Canadian dollar to immediately tumble, indicating the market wasn’t expecting this escalation.

It’s a possible sign that President Donald Trump’s wave of tariff letters is again raising concern among investors.