Summary: Protesters and police again clashed in a number of U.S. cities over the weekend, including Portland, Oregon, and Seattle. President Trump has defended sending federal law enforcement to the cities, but many local officials say their presence is only exacerbating the existing unrest. Amna Nawaz reports and talks to the mayor of Seattle, Jenny Durkan, about what she's seeing in her city. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
