Canada's Prime Minister Mark Carney faced sustained attacks from his Conservative rival at an election debate Thursday, but the Liberal leader sought to focus attention on what he calls Canada's top threat,

A big question heading into the debate was whether Liberal leader Mark Carney, who has been leading in the polls, would stumble. Carney, the former governor of the Bank of England, managed to survive Wednesday's French debate despite being less proficient in the country's second language.