Former central bank chief Mark Carney was sworn in as Canada’s prime minister on Friday, taking over at what he has called “a time of great peril” as the country faces a trade war with the United States and annexation threats from President Trump.

Carney, a former head of both the Bank of Canada and Bank of England, successfully argued his position as an outsider with a history of tackling crises meant he was the best person to take on Trump, who has repeatedly talked about annexing Canada.

Former Bank of England governor Mark Carney was sworn in as Canada’s new prime minister on Friday, and will now try to steer his country through a trade war brought by US President Donald Trump, a threat of annexation and an expected federal election.