Morgan Fox touts a new study on the non-connection:
[O]f the 13 states with available data, teen use rates have stayed the same or decreased since enacting medical marijuana laws. In some cases, these drops in teen use are pretty significant. This is not meant to imply that there is a causal relationship between medical marijuana and a drop in teen use. What the report does show, however, is that there is definitely no causal relationship between medical marijuana and an increase in teen marijuana use.
Yet Obama's DOJ just reignited the war on medical marijuana.