Canadian Prime Minister Mark Carney publicly backed Kevin Warsh as the next chair of the Federal Reserve on Friday, calling him a “fantastic choice,” in a rare point of alignment amid an escalating U.S.-Canada trade war.

“Kevin Warsh is a fantastic choice to lead the world’s most important central bank at this crucial time,” Carney wrote on X shortly after President Donald Trump announced he will nominate the former Fed board member to replace current chair, Jerome Powell.

Carney is an experienced central banker himself. He oversaw the Bank of Canada from 2008-2013, briefly overlapping with Warsh’s first tenure as a Fed governor, before leading the Bank of England from 2013-2020.

The endorsement stood out as relations between the Trump administration and Canada continue to strain, with Canadian officials warning that Trump’s trade agenda and broader foreign policy are destabilizing both the U.S. and Canadian economies.

On Saturday, Trump threatened to impose a 100 percent tariff on Canada if it follows through on a planned trade deal with China. In his latest threat Thursday, he said he would impose a 50 percent tariff on Canadian-made aircrafts after a dispute over aviation certification.

“Canada is effectively prohibiting the sale of Gulfstream products in Canada through this very same certification process,” the president wrote on Truth Social. “If, for any reason, this situation is not immediately corrected, I am going to charge Canada a 50% Tariff on any and all Aircraft sold into the United States of America.”

Earlier this week, the Bank of Canada said U.S. tariffs are expected to have a “lasting negative impact” on Canada’s economy, citing prolonged uncertainty tied to Trump’s trade policies.

“It’s pretty clear that the days of open rules-based trade with the United States are over,” Bank of Canada Gov. Tiff Macklem said. “It’s not a good thing for Americans. It’s not a good thing for Canadians.”

In an interview with Reuters on Wednesday, Macklem said Trump’s actions could derail the central bank’s economic forecasts, pointing to Trump’s repeated tariff threats against Canada and other actions abroad, including repeat pressure on Greenland and the capture of Venezuelan President Nicolás Maduro. “There is unusual potential for a new shock, a new disruption,” he said. “Geopolitical risks are elevated.”

Macklem also voiced his support for Powell, telling Reuters that he told Powell in a private conversation that he was “doing a good job under difficult circumstances.”

Several global central bank leaders, including Macklem, issued a joint statement earlier this month in support of Powell and the Federal Reserve after the Department of Justice launched a criminal investigation into the Fed chair. They warned that political pressure on central banks could undermine global financial stability.

“We stand in full solidarity with the Federal Reserve System and its Chair Jerome H. Powell,” the statement said. “Chair Powell has served with integrity, focused on his mandate and an unwavering commitment to the public interest. To us, he is a respected colleague who is held in the highest regard by all who have worked with him.”