If approved, Seattle will be the first in the US to allow drug consumption sites. It is notable that we also will be the first country to have these where there is no national health plan. Seattle does not have treatment on demand available and what public treatment is available is not the holistic wrap-around services we need. There are so many legal and ethical issues to be considered. 

Furthermore, the science for Insite is not independent. It is funded by the government and done by the doctors advocating for the sites since the late 1990s. See link below. Insite's studies do not ask how many patients died outside of Insite.

Finally, the AMA has not "endorsed" these sites. It has endorsed conducting a study. Rather than have non-medical individuals with political ideology lead these studies, we should have scientists who are skeptical. 

http://www.torontosun.com/2016/03/19/experts-challenge-vancouvers-safe-injection-stats