Mark Carney has been sworn in as Canada’s new prime minister as the nation faces Trump's trade war. 'We’re his largest client in so many industries,' Carney says.

New Canadian Prime Minister Mark Carney is heading to Paris and London on Monday to seek alliances as he deals with U.S. President Donald Trump's attacks on Canada's sovereignty and economy. Carney is purposely making his first foreign trip to the capital cities of the two countries that shaped Canada's early existence.

Mark Carney is a newcomer to elected politics, with decades of experience in finance. After his landslide victory, he pledged to continue tariffs on the U.S. "until the Americans show us respect."