Portland's Battleground

Since the election of Donald Trump rival groups of far-right and far-left activists have battled in the streets of some American cities. Violence has broken out in New York, Berkeley, and Charlottesville. But perhaps most affected is Portland, Oregon, a liberal, progressive city in the Pacific North-West. For our season on Crossing Divides, Mike Wendling has been there to meet activists from both sides to try to understand why the violence continues.