water. reporter: voters are concerns about the opioid crisis, they grill the candidates on this issue. chris? >> molly thank you. >> on this topic, our next audience question, for mayor buttigieg from alexis, a nurse practitioner. >> in my career i have worked with patients from infancy through old age including pregnant mothers suffering from abuse of addiction. >> thank you for your work, medical professionals are on the front line, maybe best thing that happened in this terrible crisis, we have come to understand these addiction emergencies, as a medical issue, not just moral, not a moral failure. and it is also really important we break the silence about this. i wonder how many folks here