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.

Carney disclosed his intentions to a crowd in Edmonton, Alberta, the western Canadian city where he spent the bulk of his youth, promising an economic agenda focused on lifting the country from a period of stagnant growth.