He was quoting what a young woman from Black Lives Matter told him.

SANDERS: “I was with young people in the Black Lives Matter movement. A young lady comes up to me and says you don't understand what police do in certain black communities. ‘You don't understand the degree to which we are terrorized. I'm not just talking about the shootings we have seen that we have to end, I'm talking about everyday activities where police officers are bullying people. You don't know what it's like to be living in a ghetto and to be poor. You don't know what it's like to be hassled when you walk down the street or get dragged out of a car.’ I believe as a nation in the year 2016, we must be firm in making it clear: We will end institutional racism and reform a broken criminal justice system.”