How ugly will this trade war get?

Days after walking away from trade talks with the U.S., Canada has hit back with dollar-for-dollar counter-tariffs on American goods. Prime Minister Mark Carney said he cut off negotiations because Washington's terms could wipe out major Canadian industries like auto, steel and aluminum. As things start to get ugly, Washington correspondents Willy Lowry, Katie Simpson and Paul Hunter dig into how bad this trade war is going to get, and what it would take to bring both sides back to the table.