Shields and Gerson on refugee crisis responsibility

Aired: 9/4/2015 | 0:13:43 | Clip
Syndicated columnist Mark Shields and Washington Post columnist Michael Gerson join Judy Woodruff to discuss the week’s news, including Hillary Clinton’s latest interview on her use of a private email server, Donald Trump’s pledge not to run as a third-party candidate, plus who should be stepping up to address the refugee crisis in Europe.