CBC's Katie Simpson and Rosemary Barton break down how the Liberals are working the phones to get U.S. tariffs lifted, including a call between Prime Minister Justin Trudeau and U.S. President Donald Trump that sources say lasted 50 minutes. Plus, Bryan Barnett, the Republican mayor of Rochester Hills, Mich., describes how tariffs will harm the city and why he believes it will be difficult to keep unity among Republicans on the policy.