CBS News asked Sanders if he approved of his supporters aggressively attacking his opponents online.
"No, I really don't," he said. "If anyone knows me, what I believe is we need a serious debate in this country on issues. We don't need to demonize people who may disagree with us."
"I appeal to my supporters: Please, engage in civil discourse," he added. "And by the way, we're not the only campaign that does it. Other people act that way as well. I would appeal to everybody: Have a debate on the issues. We can disagree with each other without being disagreeable, without being hateful. That is not what American politics should be about."