Mark Carney, a central banker turned politician, steps into his role at a crucial moment as President Trump sets his sights on Canada’s sovereignty and keeps threatening more tariffs.

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.

Hear what Canada’s new prime minister said about Trump after being sworn in Mark Carney has been sworn in as Canada’s prime minister, succeeding Justin Trudeau, as the country faces questions about its sovereignty from US President Donald Trump and a trade war with Canada’s largest trading partner,