Mark Carney has been sworn in as Canada’s prime minister, after Justin Trudeau formally stepped down, as the country faces questions about its sovereignty from Donald Trump and a trade war with Canada’s largest trading partner,

Mark Carney was sworn in by Canada's Governor General, Mary Simon. Carney, a former head of the central bank of Canada, has become the 24th prime minister in the country's history. Mark Carney, who also led the central bank of the United Kingdom,

By Promit Mukherjee and David Ljunggren OTTAWA (Reuters) -Ex-central banker Mark Carney was formally sworn in as prime minister of Canada on Friday, putting him in a position to fight tariffs from U.S.