Today, we're looking at Prime Minister Justin Trudeau's threat to Canadian grocery retail giants, warning the companies they have until Thanksgiving to bring forward a plan to reduce costs or face new taxes. Plus, the Trudeau Liberals are collapsing in the polls while the Opposition Conservatives are surging. And finally, masks are making a comeback at Montreal's McGill University Health Centre, with health-care workers who interact with patients in clinical areas now forced to mask up.