President Donald Trump late Thursday threatened a 35% tariff on goods imported from Canada, a dramatic escalation in an on-again, off-again trade war with America’s northern neighbor and one of its most important trading partners.

The country’s new prime minister, Mark Carney, has been called the “Trump whisperer,” and negotiations have been cordial and professional. But it’s been a wild ride.

Canada has made concessions to win goodwill with the White House. Trump, in return, has threatened steeper tariffs.

Canada would bear the brunt of Trump's tariffs in terms of economic contraction, says The Budget Lab of Yale.

The president said the blanket 35% would be on top of tariffs on certain sectors. That’s higher than the previous 25% rate.

Plus, the Justice Department has subpoenaed 20 doctors and clinics involved in “performing transgender medical procedures on children.”

U.S. President Donald Trump has launched a global trade war with an array of tariffs that target individual products and countries. Trump has set a baseline tariff of 10% on all imports to the United States,