Late last year, Senator Jeff Merkley was one of the first national politicians to blow the whistle on the Trump administration's detention of unaccompanied migrant children on the southern border. The Democratic senator sat down with Mother Jones editor-in-chief Clara Jeffery at the Commonwealth Club last week, where he spoke in no uncertain terms about the administration's pattern of targeting of immigrants, the trauma caused by incarceration, and why the future of the United States hinges on kicking Trump out of office.