Extras

Video thumbnail: PBS NewsHour Sec. Mattis resigns, citing differences over alliances

PBS NewsHour

Sec. Mattis resigns, citing differences over alliances

Defense Secretary Mattis resigns, citing differences over the role of alliances

Sec. Mattis resigns, citing differences over alliances

Video thumbnail: PBS NewsHour Trump says immigrants can't be in U.S. during asylum process

PBS NewsHour

Trump says immigrants can't be in U.S. during asylum process

Trump administration says it will keep immigrants in Mexico throughout asylum process

Trump says immigrants can't be in U.S. during asylum process

Video thumbnail: PBS NewsHour Comedy duo the Lucas Brothers on 'survivor's guilt'

PBS NewsHour

Comedy duo the Lucas Brothers on 'survivor's guilt'

Comedy duo the Lucas Brothers on 'survivor's guilt' and Bernie Sanders

Comedy duo the Lucas Brothers on 'survivor's guilt'