Mark Carney's official campaign launch for Liberal leader included high praise from supporters and some unexpected moments behind the scenes including a glitchy teleprompter, a mysterious limousine booking and police showing up on scene.

Mark Carney announced his bid to become leader of the Liberal Party of Canada surrounded by dozens of supporters in Edmonton on Thursday.

Mark Carney, the former governor of Canada's central bank, on Thursday launched his bid to succeed Justin Trudeau as Liberal Party leader and prime minister, immediately becoming a frontrunner in the race.