<p>Mark Wiseman made his debut as Canada’s ambassador to the U.S. this week, and the stakes couldn’t be higher. He starts the post in a complicated time for Canadian-U.S. relations, taking over from Kirsten Hillman, a stable presence and a dogged negotiator for Canada since her appointment in 2020. So what will this changing of the guard mean for Canada?</p><p><br></p><p>CBC’s Washington correspondents Paul Hunter, Katie Simpson and Willy Lowry take a look at what role the Canadian ambassador to the U.S. plays in Washington and how much power Wiseman and others have to actually move the needle with the Trump administration.</p>