Virtual campaigning ‘a double-edged sword’ for 2020 Dems

Tonight the 11th Democratic presidential debate will feature only two candidates, and this time there will be no audience as Joe Biden and Bernie Sanders face off. But as the coronavirus shuts down much of traditional politics, virtual events are replacing public campaign rallies. NewsHour political reporter Daniel Bush joins Hari Sreenivasan for more on how the political landscape is changing.