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.

The federal minister responsible for Canada-U.S. trade says Canada won’t accept a bad deal from U.S. President Donald Trump’s administration and that there was no viable deal on the table this week.