Dominic LeBlanc said he expects President Donald Trump and Prime Minister Mark Carney to speak in the coming days.

Numerous countries around the world are facing the prospect of new tariffs on their exports to the United States on Aug. 7, a potential blow to the global economy, because they haven't yet reached a trade deal with the Trump administration.

Countries that have not received a prior letter on tariffs from Trump or negotiated a trade framework will be notified of their likely tariff rates, Leavitt said, either in the form of a letter or Trump’s executive order. At least two dozen countries were sent letters setting out their tariff rates.