Which Party Has a Diversity Problem? A Rundown of the Democrats' Struggles with Black Voters

Each week the Democratic debate stage has been getting more and more homogenous. They started off with several minority candidates, including Sens. Cory Booker (NJ), Kamala Harris (CA), and former HUD Secretary Julian Castro. But with businessman Andrew Yang's departure from the race after last week's New Hampshire primary, diversity is MIA.