Sunday on PBS News Weekend, as the U.S., Canada and Mexico move toward a trade war, we get the view from north of the border with the Canadian ambassador to the United States. Then, the mental health toll of the devastating California wildfires as residents sift through the ashes of upended lives. Plus, why a deadly strain of bird flu is sending egg prices skyrocketing nationwide. PBS News is supported by - https://www.pbs.org/newshour/about/funders