. >> laura: today senator pete ricketts said you would follow the science on marijuana harms documented. studies saying pot causes psychosis. one from canada and one covered from the "new york times." multiple pieces in the times. increases the chances of death. are you concerned about the normalization of high thc marijuana, especially among our young people and what might you do about it? >> i am worried about it. i have been in recovery for 42 years. i go to 12 step meetings, laura, every day. so i hear stories all the time of people of the impacts of marijuana on people and really catastrophic impacts on them. that worry also has to be balanced, you know, the impacts that we had before the 25 states legalized marijuana but we had about a third of our prison population that was in jail because of marijuana offenses that's something we don't want either. we have because of the legalization of recreational marijuana in 25 states, we have now a capacity to really study it to compare it? >> studies look bad. >> we need to do studies and figure out and then we need to implement policies t