Measuring the ‘Trump effect’ on the 2016 presidential race

With one of the most contentious and unusual primary seasons in history winding down, presumptive nominees Donald Trump and Hillary Clinton are gearing up for what promises to be an equally volatile general election. Gwen Ifill talks to senior Trump campaign adviser Barry Bennett, Beth Reinhard of The Wall Street Journal and Ann Selzer of Selzer & Company for more on what to expect this fall.