SANDERS: "That's a tragic reality that exists today."
BIDEN: "And it's deep. It's serious. And it's wrong what's going on."
O'ROURKE "So we cannot allow this to be inevitable or to be the expectation that we set for our kids."
HARRIS: "The children who are sitting in those classrooms afraid and in terror could care less about whether we are Democrats or Republicans."
BUTTIGIEG: "We have accepted the unacceptable too long."