US President Donald Trump's former Chief Strategist, Steve Bannon, has stepped down from his role as Executive Chairman of the Breitbart News Network. The right wing media outlet played a key role in galvanising support for Trump during the 2016 election campaign. The decision comes after Bannon's quotes in a new tell-all book sparked a feud with the President. Listen to ABC NewsRadio's Sandy Aloisi interview Dr David Smith, Senior Lecturer in American Politics and Foreign Policy with the United States Studies Centre at the University of Sydney.