The attempted assassination of Donald Trump

Donald Trump is injured but has survived an assassination attempt while speaking at a rally in Pennsylvania.  The shooting has shocked the United States, a country no stranger to political violence and gun crimes.  Today, Associate Professor David Smith from the United States Studies Centre at Sydney University, on what has happened and what it means for November's presidential election. Featured:  David Smith, Associate Professor in American Politics and Foreign Policy from the United States Studies Centre at Sydney University