The announcement is a reversal for Trump, who initially initially praised the agreement with China as something Canadian Prime Minister Mark Carney "should be doing."

It was a volatile week for trans-Atlantic relations, marked by President Trump statements that unsettled global markets and strained ties with U.S. allies — on topics ranging from Greenland to Gaza.

After Canadian Prime Minister Mark Carney announced he would lower tariffs, President Trump said "We want to be very good to Canada. I like Carney a lot. I think he's a very good person."

The king's visit is being seen in Canada as an opportunity for the nation to bolster its sovereignty amid threats by President Trump to turn the United States' northern neighbor into the 51st state.

Prime Minister Mark Carney won the Canadian election vowing to take on President Trump. Tuesday, they meet for the first time in the Oval Office.

Mark Carney wins Canada's election, seizing on strong public sentiment against U.S. President Donald Trump. But it's still not clear if his Liberal Party has won an outright majority in Parliament.